Roundcube 1.6.4 → 1.7.5

22 releases · 11 breaking changes · 180 security fixes · 0 advisories fixed

180security11breaking2deprecated10feature174fix

Is 1.6.4 affected?

Breaking changes

breaking Dropped support for PHP < 8.1. in 1.7.0
breaking Dropped support for Internet Explorer. in 1.7.0
breaking Dropped support for MS SQL Server and Oracle. in 1.7.0
breaking public_html/ entry-point made mandatory, all static resources are served via public_html/static.php. in 1.7.0
breaking Removed apc cache driver (replaced by apcu cache driver). in 1.7.0
breaking Changed smtp_log option default value to false. in 1.7.0
breaking Removed contact_search_name option in favor of contactlist_name_template. in 1.7.0
breaking Replaced session property changed by expires_at. in 1.7.0
breaking Removed the (insecure) virtualmin password driver. in 1.7.0
breaking Remove mobile/floating Create button from the list in Settings > Folders (#9661) in 1.6.11
breaking Fix bug where trailing non-ascii characters in email addresses could have been removed in recipient input (#9257) in 1.6.6

Security changes

security Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96, reported by dizconnect. in 1.7.5
security Fix CSRF validation bypass in the mark-as-junk action, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. in 1.7.5
security Fix XSS issue in handling of password driver error responses, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. in 1.7.5
security Security: Fix IMAP command injection via CRLF in _uid parameter of mail/headers and mail/viewsource action in 1.7.5
security Security: Fix bug where an alias login wasn't qualified by IMAP host in 1.7.5
security Security: Add a size limit to the CSS proxy content processing in 1.7.5
security Security: Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96 in 1.7.5
security Security: Fix remote content blocking bypass via SVG SMIL by attribute in 1.7.5
security Security: Fix remote content blocking bypass via CSS escapes in FuncIRI attributes (again) in 1.7.5
security Security: Fix passing potentally unsafe attachment content into ImageMagick on image resize in 1.7.5
security Security: Fix mail header injection via the From display-name in the Bounce (resend) action in 1.7.5
security Security: Fix mail header injection via References/In-Reply-To/Message-ID/From parameters in 1.7.5
security Security: Fix object injection primitive in rcube_session::unserialize() via "!"-prefixed session keys in 1.7.5
security Security: Fix ImageMagick resource limits bypass by GD fallback during thumbnail generation in 1.7.5
security Security: Fix CSS scoping bypass in HTML messages using at-rules in 1.7.5
security Security: Fix bug where deprecated action aliases bypassed disabled_actions setting in 1.7.5
security Security: Fix IMAP command injection via CRLF in _flag parameter of mail/mark action in 1.7.5
security Security: Fix CSRF validation bypass in the mark-as-junk action in 1.7.5
security Security: Fix XSS issue in handling of password driver error responses in 1.7.5
security Security: Fix mail header injection via subject of a message forwarded as attachment in 1.7.5
security Security: Fix mail header injection via media type in an inline image data URI in 1.7.5
security Security: Fix bug where Password Modoboa driver could change password for another account in 1.7.5
security Security: Fix unsafe use of a login name in SquirrelMail import file path in 1.7.5
security Fix zero-click stored XSS via TNEF MIME tag injection in the attachment URL, reported by nakko in 1.7.4
security Fix XSS in the HTML editor using text/enriched part content, reported by Joshua Rogers in 1.7.4
security Fix SSRF bypass in Roundcube CSS proxy via hexadecimal IPv6-mapped IPv4 addresses, reported by faceless0x7 and Harish Annavisamy in 1.7.4
security Security: Fix CSS declaration smuggling via un-encoded ampersand emission in 1.7.4
security Security: Fix CSS property injection via body background attribute in 1.7.4
security Security: Fix email header injection via bare CR in the subject field in 1.7.4
security Security: Fix email header injection via C-escape \r in the recipient display name in 1.7.4
security Security: Fix email header injection via identity's organization field in 1.7.4
security Security: Fix zero-click stored XSS via TNEF MIME tag injection in the attachment URL in 1.7.4
security Security: Fix XSS in the HTML editor using text/enriched part content in 1.7.4
security Security: Fix cross-user access in contact group membership (add/remove) in the SQL address book in 1.7.4
security Security: Fix is_local_url() bypass via trailing-dot FQDN in stylesheet URL in 1.7.4
security Security: Fix remote content blocking bypass via CSS escapes in FuncIRI attributes in 1.7.4
security Security: Fix remote-content blocker bypass via SVG SMIL src animation in 1.7.4
security Security: Fix SSRF bypass in Roundcube CSS proxy via hexadecimal IPv6-mapped IPv4 addresses in 1.7.4
security Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets, reported by Dmytro Ivanenko in 1.7.3
security Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is_local_url() check, reported by Milan Hoppe in 1.7.3
security Fix RCE via cmd_learn driver of markasjunk plugin, reported by nept1337 in 1.7.3
security Fix stored XSS in "Add to address book" action, reported by Paulos Yibelo from pwn.ai in 1.7.3
security Security: Add basic validation for content proxied by the css proxy in 1.7.3
security Security: Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets in 1.7.3
security Security: Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is_local_url() check in 1.7.3
security Security: Fix remote content blocking bypass via unclosed url() in a FuncIRI attribute in 1.7.3
security Security: Fix LDAP filter injection via unescaped %u/%fu/%d substitution into the search_filter in 1.7.3
security Security: Fix arbitrary Sieve script injection via a filter rule name bypassing managesieve_disabled_actions in 1.7.3
security Security: Fix RCE via cmd_learn driver of markasjunk plugin in 1.7.3
security Security: Fix IMAP command injection via mail search and LITERAL+ byte-count desynchronization in 1.7.3
security Security: Fix password's modoboa driver leak of an authentication token to a user-controlled host in 1.7.3
security Security: Fix stored XSS in "Add to address book" action in 1.7.3
security Security: Fix HTML/CSS sanitization bypass via SVG animate by attribute. in 1.7.3
security Fix various vulnerabilities in the password plugin using session-injected username, reported by Glendaenri and peppersghost. in 1.7.2
security Fix stored XSS via unescaped attachment MIME type on the attachment-validation warning page [CVE-2026-54432], reported by Bohdan Kurinnoy, Samsung R&D Instit in 1.7.2
security Fix SSRF bypass via specific local address URLs - two new cases, reported by Leenear. in 1.7.2
security Fix zero-click stored XSS in plain-text rendering [CVE-2026-54433], reported by Bohdan Kurinnoy, Samsung R&D Institute Ukraine (SRUKR). in 1.7.2
security Security: Fix an infinite loop in TNEF (winmail.dat) decoder (#10193) in 1.7.2
security Security: Fix various vulnerabilities in the password plugin using session-injected username in 1.7.2
security Security: Fix stored XSS via unescaped attachment MIME type on the attachment-validation warning page [CVE-2026-54432] in 1.7.2
security Security: Fix SSRF bypass via specific local address URLs - two new cases in 1.7.2
security Security: Fix zero-click stored XSS in plain-text rendering [CVE-2026-54433] in 1.7.2
security Security: Fix DoS via crafted compressed-RTF size in the TNEF (winmail.dat) file in 1.7.2
security Fix stored XSS/HTML/CSS injection in subject field of the draft restore dialog, reported by Anand Jogawade (zazy) in 1.7.1
security Fix pre-auth SQL injection in virtuser_query plugin via preg_replace backslash escape bypass, reported by skull in 1.7.1
security Fix SSRF bypass via specific local address URLs in 1.7.1
security Fix local/private URL fetch bypass when remote resources were not allowed, reported by Orange Cyberdefense Vulnerability Disclosure Team in 1.7.1
security Fix code injection vulnerability - remove support for code evaluation in LDAP autovalues option, reported by Glendaenri in 1.7.1
security Security: Fix stored XSS/HTML/CSS injection in subject field of the draft restore dialog in 1.7.1
security Security: Fix CSS injection bypass in HTML sanitizer via SVG in 1.7.1
security Security: Fix pre-auth SQL injection in virtuser_query plugin via preg_replace backslash escape bypass in 1.7.1
security Security: Fix SSRF bypass via specific local address URLs in 1.7.1
security Security: Fix bypass of remote image blocking via CSS var() in 1.7.1
security Security: Fix local/private URL fetch bypass when remote resources were not allowed in 1.7.1
security Security: Fix pre-auth arbitrary file delete via redis/memcache session poisoning bypass in 1.7.1
security Security: Fix code injection vulnerability - remove support for code evaluation in LDAP autovalues option in 1.7.1
security Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96, reported by dizconnect. in 1.6.20
security Fix CSRF validation bypass in the mark-as-junk action, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. in 1.6.20
security Fix XSS issue in handling of password driver error responses, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. in 1.6.20
security Security: Fix IMAP command injection via CRLF in _uid parameter of mail/headers and mail/viewsource action in 1.6.20
security Security: Fix bug where an alias login wasn't qualified by IMAP host in 1.6.20
security Security: Add a size limit to the CSS proxy content processing in 1.6.20
security Security: Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96 in 1.6.20
security Security: Fix remote content blocking bypass via SVG SMIL by attribute in 1.6.20
security Security: Fix remote content blocking bypass via CSS escapes in FuncIRI attributes (again) in 1.6.20
security Security: Fix passing potentally unsafe attachment content into ImageMagick on image resize in 1.6.20
security Security: Fix mail header injection via the From display-name in the Bounce (resend) action in 1.6.20
security Security: Fix mail header injection via References/In-Reply-To/Message-ID/From parameters in 1.6.20
security Security: Fix object injection primitive in rcube_session::unserialize() via "!"-prefixed session keys in 1.6.20
security Security: Fix ImageMagick resource limits bypass by GD fallback during thumbnail generation in 1.6.20
security Security: Fix CSS scoping bypass in HTML messages using at-rules in 1.6.20
security Security: Fix bug where deprecated action aliases bypassed disabled_actions setting in 1.6.20
security Security: Fix IMAP command injection via CRLF in _flag parameter of mail/mark action in 1.6.20
security Security: Fix CSRF validation bypass in the mark-as-junk action in 1.6.20
security Security: Fix XSS issue in handling of password driver error responses in 1.6.20
security Security: Fix mail header injection via subject of a message forwarded as attachment in 1.6.20
security Security: Fix mail header injection via media type in an inline image data URI in 1.6.20
security Security: Fix bug where Password Modoboa driver could change password for another account in 1.6.20
security Security: Fix unsafe use of a login name in SquirrelMail import file path in 1.6.20
security Fix zero-click stored XSS via TNEF MIME tag injection in the attachment URL, reported by nakko in 1.6.19
security Fix XSS in the HTML editor using text/enriched part content, reported by Joshua Rogers in 1.6.19
security Fix SSRF bypass in Roundcube CSS proxy via hexadecimal IPv6-mapped IPv4 addresses, reported by faceless0x7 and Harish Annavisamy in 1.6.19
security Security: Fix CSS declaration smuggling via un-encoded ampersand emission in 1.6.19
security Security: Fix CSS property injection via body background attribute in 1.6.19
security Security: Fix email header injection via bare CR in the subject field in 1.6.19
security Security: Fix email header injection via C-escape \r in the recipient display name in 1.6.19
security Security: Fix email header injection via identity's organization field in 1.6.19
security Security: Fix zero-click stored XSS via TNEF MIME tag injection in the attachment URL in 1.6.19
security Security: Fix XSS in the HTML editor using text/enriched part content in 1.6.19
security Security: Fix cross-user access in contact group membership (add/remove) in the SQL address book in 1.6.19
security Security: Fix is_local_url() bypass via trailing-dot FQDN in stylesheet URL in 1.6.19
security Security: Fix remote content blocking bypass via CSS escapes in FuncIRI attributes in 1.6.19
security Security: Fix remote-content blocker bypass via SVG SMIL src animation in 1.6.19
security Security: Fix SSRF bypass in Roundcube CSS proxy via hexadecimal IPv6-mapped IPv4 addresses in 1.6.19
security Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets, reported by Dmytro Ivanenko in 1.6.18
security Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is_local_url() check, reported by Milan Hoppe in 1.6.18
security Fix RCE via cmd_learn driver of markasjunk plugin, reported by nept1337 in 1.6.18
security Fix stored XSS in "Add to address book" action, reported by Paulos Yibelo from pwn.ai in 1.6.18
security Security: Add basic validation for content proxied by the css proxy in 1.6.18
security Security: Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets in 1.6.18
security Security: Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is_local_url() check in 1.6.18
security Security: Fix remote content blocking bypass via unclosed url() in a FuncIRI attribute in 1.6.18
security Security: Fix LDAP filter injection via unescaped %u/%fu/%d substitution into the search_filter in 1.6.18
security Security: Fix arbitrary Sieve script injection via a filter rule name bypassing managesieve_disabled_actions in 1.6.18
security Security: Fix RCE via cmd_learn driver of markasjunk plugin in 1.6.18
security Security: Fix IMAP command injection via mail search and LITERAL+ byte-count desynchronization in 1.6.18
security Security: Fix password's modoboa driver leak of an authentication token to a user-controlled host in 1.6.18
security Security: Fix stored XSS in "Add to address book" action in 1.6.18
security Security: Fix HTML/CSS sanitization bypass via SVG animate by attribute in 1.6.18
security Fix various vulnerabilities in the password plugin using session-injected username, reported by Glendaenri and peppersghost. in 1.6.17
security Fix stored XSS via unescaped attachment MIME type on the attachment-validation warning page [CVE-2026-54432], reported by Bohdan Kurinnoy, Samsung R&D Instit in 1.6.17
security Fix SSRF bypass via specific local address URLs - two new cases, reported by Leenear. in 1.6.17
security Fix zero-click stored XSS in plain-text rendering [CVE-2026-54433], reported by Bohdan Kurinnoy, Samsung R&D Institute Ukraine (SRUKR). in 1.6.17
security Security: Fix an infinite loop in TNEF (winmail.dat) decoder (#10193) in 1.6.17
security Security: Fix various vulnerabilities in the password plugin using session-injected username in 1.6.17
security Security: Fix stored XSS via unescaped attachment MIME type on the attachment-validation warning page [CVE-2026-54432] in 1.6.17
security Security: Fix SSRF bypass via specific local address URLs - two new cases in 1.6.17
security Security: Fix zero-click stored XSS in plain-text rendering [CVE-2026-54433] in 1.6.17
security Security: Fix DoS via crafted compressed-RTF size in the TNEF (winmail.dat) file in 1.6.17
security Fix stored XSS/HTML/CSS injection in subject field of the draft restore dialog, reported by Anand Jogawade (zazy) in 1.6.16
security Fix pre-auth SQL injection in virtuser_query plugin via preg_replace backslash escape bypass, reported by skull in 1.6.16
security Fix SSRF bypass via specific local address URLs in 1.6.16
security Fix local/private URL fetch bypass when remote resources were not allowed, reported by Orange Cyberdefense Vulnerability Disclosure Team in 1.6.16
security Fix code injection vulnerability - remove support for code evaluation in LDAP autovalues option, reported by Glendaenri in 1.6.16
security Security: Fix stored XSS/HTML/CSS injection in subject field of the draft restore dialog in 1.6.16
security Security: Fix CSS injection bypass in HTML sanitizer via SVG in 1.6.16
security Security: Fix pre-auth SQL injection in virtuser_query plugin via preg_replace backslash escape bypass in 1.6.16
security Security: Fix SSRF bypass via specific local address URLs in 1.6.16
security Security: Fix bypass of remote image blocking via CSS var() in 1.6.16
security Security: Fix local/private URL fetch bypass when remote resources were not allowed in 1.6.16
security Security: Fix pre-auth arbitrary file delete via redis/memcache session poisoning bypass in 1.6.16
security Security: Fix code injection vulnerability - remove support for code evaluation in LDAP autovalues option in 1.6.16
security Fix IMAP Injection + CSRF bypass in mail search, reported by Martila Security Research Team. in 1.6.14
security Fix XSS issue in a HTML attachment preview, reported by aikido_security. in 1.6.14
security Fix SSRF + Information Disclosure via stylesheet links to a local network hosts, reported by Georgios Tsimpidas (aka Frey), Security Researcher at https://i0.rs/. in 1.6.14
security Security: Fix pre-auth arbitrary file write via unsafe deserialization in redis/memcache session handler in 1.6.14
security Security: Fix bug where a password could get changed without providing the old password in 1.6.14
security Security: Fix IMAP Injection + CSRF bypass in mail search in 1.6.14
security Security: Fix remote image blocking bypass via various SVG animate attributes in 1.6.14
security Security: Fix remote image blocking bypass via a crafted body background attribute in 1.6.14
security Security: Fix fixed position mitigation bypass via use of !important in 1.6.14
security Security: Fix XSS issue in a HTML attachment preview in 1.6.14
security Security: Fix SSRF + Information Disclosure via stylesheet links to a local network hosts in 1.6.14
security Fix CSS injection vulnerability reported by CERT Polska. in 1.6.13
security Fix Cross-Site-Scripting vulnerability via SVG's animate tag reported by Valentin T., CrowdStrike. in 1.6.12
security Fix Information Disclosure vulnerability in the HTML style sanitizer reported by somerandomdev. in 1.6.12
security Remove X-XSS-Protection example from .htaccess file (#9875) in 1.6.12
security Fix Cross-Site-Scripting vulnerability via SVG's animate tag in 1.6.12
security Fix Information Disclosure vulnerability in the HTML style sanitizer in 1.6.12
security Fix Post-Auth RCE via PHP Object Deserialization reported by firs0v. in 1.6.11
security Fix XSS vulnerability in post-processing of sanitized HTML content [CVE-2024-42009] in 1.6.8
security Fix XSS vulnerability in serving of attachments other than HTML or SVG [CVE-2024-42008] in 1.6.8
security Fix information leak (access to remote content) via insufficient CSS filtering [CVE-2024-42010] in 1.6.8
security Fix cross-site scripting (XSS) vulnerability in handling SVG animate attributes. Reported by Valentin T. and Lutz Wolf of CrowdStrike. in 1.6.7
security Fix cross-site scripting (XSS) vulnerability in handling list columns from user preferences. Reported by Huy Nguyễn Phạm Nhật. in 1.6.7
security Fix cross-site scripting (XSS) vulnerability in handling SVG animate attributes in 1.6.7
security Fix cross-site scripting (XSS) vulnerability in handling list columns from user preferences in 1.6.7
security Update to TinyMCE 5.10.9 security release (#9228) in 1.6.6
security Fix cross-site scripting (XSS) vulnerability in setting Content-Type/Content-Disposition for attachment preview/download reported by Rene Rehme (rehme.infosec). in 1.6.5
security Fix cross-site scripting (XSS) vulnerability in setting Content-Type/Content-Disposition for attachment preview/download in 1.6.5

Deprecations

deprecated Fix bug where deprecated action aliases bypassed disabled_actions setting, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. in 1.7.5
deprecated Fix bug where deprecated action aliases bypassed disabled_actions setting, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. in 1.6.20

Every release in between

1.7.5 Oct 19, 2026 Release notes ↗

fixFix IMAP command injection via CRLF in _uid parameter of mail/headers and mail/viewsource action, reported by Wahab "NeoX" K.

fixFix bug where an alias login wasn't qualified by IMAP host, reported by Milan Hoppe.

featureAdd a size limit to the CSS proxy content processing, reported by Milan Hoppe.

securityFix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96, reported by dizconnect.

fixFix remote content blocking bypass via SVG SMIL by attribute, reported by Milan Hoppe.

fixFix remote content blocking bypass via CSS escapes in FuncIRI attributes (again), reported by Milan Hoppe.

fixFix passing potentally unsafe attachment content into ImageMagick on image resize, reported by Paulos Yibelo

fixFix mail header injection via the From display-name in the Bounce (resend) action, reported by Clay.

fixFix mail header injection via References/In-Reply-To/Message-ID/From parameters, reported by Sunil Tripathy.

fixFix object injection primitive in rcube_session::unserialize() via "!"-prefixed session keys, reported by Oli Z.

fixFix ImageMagick resource limits bypass by GD fallback during thumbnail generation, reported by GoldenSW.

fixFix CSS scoping bypass in HTML messages using at-rules, reported by GoldenSW.

deprecatedFix bug where deprecated action aliases bypassed disabled_actions setting, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.

fixFix IMAP command injection via CRLF in _flag parameter of mail/mark action, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.

securityFix CSRF validation bypass in the mark-as-junk action, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.

securityFix XSS issue in handling of password driver error responses, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.

fixFix mail header injection via subject of a message forwarded as attachment, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.

fixFix mail header injection via media type in an inline image data URI, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.

fixFix bug where Password Modoboa driver could change password for another account, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.

featureInstaller: Add possibility to detsroy the installer session/cookie

securitySecurity: Fix IMAP command injection via CRLF in _uid parameter of mail/headers and mail/viewsource action

securitySecurity: Fix bug where an alias login wasn't qualified by IMAP host

securitySecurity: Add a size limit to the CSS proxy content processing

securitySecurity: Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96

securitySecurity: Fix remote content blocking bypass via SVG SMIL by attribute

securitySecurity: Fix remote content blocking bypass via CSS escapes in FuncIRI attributes (again)

securitySecurity: Fix passing potentally unsafe attachment content into ImageMagick on image resize

securitySecurity: Fix mail header injection via the From display-name in the Bounce (resend) action

securitySecurity: Fix mail header injection via References/In-Reply-To/Message-ID/From parameters

securitySecurity: Fix object injection primitive in rcube_session::unserialize() via "!"-prefixed session keys

securitySecurity: Fix ImageMagick resource limits bypass by GD fallback during thumbnail generation

securitySecurity: Fix CSS scoping bypass in HTML messages using at-rules

securitySecurity: Fix bug where deprecated action aliases bypassed disabled_actions setting

securitySecurity: Fix IMAP command injection via CRLF in _flag parameter of mail/mark action

securitySecurity: Fix CSRF validation bypass in the mark-as-junk action

securitySecurity: Fix XSS issue in handling of password driver error responses

securitySecurity: Fix mail header injection via subject of a message forwarded as attachment

securitySecurity: Fix mail header injection via media type in an inline image data URI

securitySecurity: Fix bug where Password Modoboa driver could change password for another account

securitySecurity: Fix unsafe use of a login name in SquirrelMail import file path

+5 more items in the release notes

1.7.4 Sep 6, 2026 Release notes ↗

fixFix CSS declaration smuggling via un-encoded ampersand emission, reported by Zach Hanley of Horizon3.ai

fixFix CSS property injection via body background attribute, reported by zenithhostingevan

fixFix email header injection via bare CR in the subject field, reported by CVE-Hunter-Leo

fixFix email header injection via C-escape \r in the recipient display name, reported by dogeshark

fixFix email header injection via identity's organization field, reported by dogeshark

securityFix zero-click stored XSS via TNEF MIME tag injection in the attachment URL, reported by nakko

securityFix XSS in the HTML editor using text/enriched part content, reported by Joshua Rogers

fixFix cross-user access in contact group membership (add/remove) in the SQL address book, reported by Joshua Rogers

fixFix is_local_url() bypass via trailing-dot FQDN in stylesheet URL, reported by nept1337

fixFix remote content blocking bypass via CSS escapes in FuncIRI attributes, reported by Wahab KHADIR

fixFix remote-content blocker bypass via SVG SMIL src animation

securityFix SSRF bypass in Roundcube CSS proxy via hexadecimal IPv6-mapped IPv4 addresses, reported by faceless0x7 and Harish Annavisamy

otherUse X-Content-Type-Options:nosniff for attachment previews and downloads (#10308)

fixzipdownload: Fix attachment filename sanitisation of backslash and control characters (#10325)

securitySecurity: Fix CSS declaration smuggling via un-encoded ampersand emission

securitySecurity: Fix CSS property injection via body background attribute

securitySecurity: Fix email header injection via bare CR in the subject field

securitySecurity: Fix email header injection via C-escape \r in the recipient display name

securitySecurity: Fix email header injection via identity's organization field

securitySecurity: Fix zero-click stored XSS via TNEF MIME tag injection in the attachment URL

securitySecurity: Fix XSS in the HTML editor using text/enriched part content

securitySecurity: Fix cross-user access in contact group membership (add/remove) in the SQL address book

securitySecurity: Fix is_local_url() bypass via trailing-dot FQDN in stylesheet URL

securitySecurity: Fix remote content blocking bypass via CSS escapes in FuncIRI attributes

securitySecurity: Fix remote-content blocker bypass via SVG SMIL src animation

securitySecurity: Fix SSRF bypass in Roundcube CSS proxy via hexadecimal IPv6-mapped IPv4 addresses

1.7.3 Aug 9, 2026 Release notes ↗

featureAdd basic validation for content proxied by the css proxy

securityFix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets, reported by Dmytro Ivanenko

securityFix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is_local_url() check, reported by Milan Hoppe

fixFix remote content blocking bypass via unclosed url() in a FuncIRI attribute, reported by Milan Hoppe

fixFix LDAP filter injection via unescaped %u/%fu/%d substitution into the search_filter, reported by Milan Hoppe

fixFix arbitrary Sieve script injection via a filter rule name bypassing managesieve_disabled_actions, reported by Milan Hoppe

securityFix RCE via cmd_learn driver of markasjunk plugin, reported by nept1337

fixFix IMAP command injection via mail search and LITERAL+ byte-count desynchronization, reported by Zach Hanley of Horizon3.ai

fixFix password's modoboa driver leak of an authentication token to a user-controlled host, reported by meifukun

securityFix stored XSS in "Add to address book" action, reported by Paulos Yibelo from pwn.ai

fixFix HTML/CSS sanitization bypass via SVG animate by attribute, reported by vectrain

otherOAuth: Don't log an error when a refreshed token's TTL is below refresh_interval (#10213)

fixFix out-of-bounds string reads on truncated compressed-RTF in the TNEF decoder (#10269)

fixFix bug where searching in example_addressbook plugin was reporting zero results despite matches (#9022)

fixFix vCard import mis-detecting folded continuation lines as BEGIN/END:VCARD (#9593)

fixFix bug where the php session driver practically disabled session.lazy_write optimization (#9885, #10248)

fixFix bug where dates could get displayed shifted back one day in some places (#9403)

fixFix regression where it wasn't possible to hide a skin logo image anymore (#10254)

fixFix decoding of multi-segment RFC2231 extended attachment filenames (#10268)

fixFix vCard import silently dropping properties with a non-item group prefix (#10271)

fixFix so REQUEST_URI is used as a fallback if PATH_INFO is empty in static.php (#10181)

securitySecurity: Add basic validation for content proxied by the css proxy

securitySecurity: Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets

securitySecurity: Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is_local_url() check

securitySecurity: Fix remote content blocking bypass via unclosed url() in a FuncIRI attribute

securitySecurity: Fix LDAP filter injection via unescaped %u/%fu/%d substitution into the search_filter

securitySecurity: Fix arbitrary Sieve script injection via a filter rule name bypassing managesieve_disabled_actions

securitySecurity: Fix RCE via cmd_learn driver of markasjunk plugin

securitySecurity: Fix IMAP command injection via mail search and LITERAL+ byte-count desynchronization

securitySecurity: Fix password's modoboa driver leak of an authentication token to a user-controlled host

securitySecurity: Fix stored XSS in "Add to address book" action

securitySecurity: Fix HTML/CSS sanitization bypass via SVG animate by attribute.

1.7.2 Jul 5, 2026 Release notes ↗

fixFix an infinite loop in TNEF (winmail.dat) decoder (#10193), reported by stafra.

securityFix various vulnerabilities in the password plugin using session-injected username, reported by Glendaenri and peppersghost.

securityFix stored XSS via unescaped attachment MIME type on the attachment-validation warning page [CVE-2026-54432], reported by Bohdan Kurinnoy, Samsung R&D Instit

securityFix SSRF bypass via specific local address URLs - two new cases, reported by Leenear.

securityFix zero-click stored XSS in plain-text rendering [CVE-2026-54433], reported by Bohdan Kurinnoy, Samsung R&D Institute Ukraine (SRUKR).

fixFix DoS via crafted compressed-RTF size in the TNEF (winmail.dat) file, reported by h0rk1p.

featureAdd HEAD request handler to the static.php

fixFix so the oauth_password_claim claim is retrieved via token or userinfo request (#9631)

fixFix bug where static.php would return a 416 error on a specific Range request (#10194)

fixFix bug where configured skin logo wasn't loaded via static.php resulting in 404 error (#10191)

fixFix bug where installto.sh would fail if public_html folder does not exist in the target directory (#10202)

otherRevert "Prefer 8bit over quoted-printable for HTML parts, when force_7bit is disabled (#8477)" (#10198)

fixFix incorrect unfolding of folded lines when importing vCard 2.1 contacts (#9647)

fixFix bug where Imagick could leave large temporary files on failure (#10230)

fixFix bug where redis/memcache session could have been updated more often than needed

fixFix support for untyped tokens in OIDC backchannel logout, require unset nonce (#10097)

securitySecurity: Fix an infinite loop in TNEF (winmail.dat) decoder (#10193)

securitySecurity: Fix various vulnerabilities in the password plugin using session-injected username

securitySecurity: Fix stored XSS via unescaped attachment MIME type on the attachment-validation warning page [CVE-2026-54432]

securitySecurity: Fix SSRF bypass via specific local address URLs - two new cases

securitySecurity: Fix zero-click stored XSS in plain-text rendering [CVE-2026-54433]

securitySecurity: Fix DoS via crafted compressed-RTF size in the TNEF (winmail.dat) file

1.7.1 May 24, 2026 Release notes ↗

securityFix stored XSS/HTML/CSS injection in subject field of the draft restore dialog, reported by Anand Jogawade (zazy)

fixFix CSS injection bypass in HTML sanitizer via SVG , reported by wooseokdotkim

securityFix pre-auth SQL injection in virtuser_query plugin via preg_replace backslash escape bypass, reported by skull

securityFix SSRF bypass via specific local address URLs

securityFix local/private URL fetch bypass when remote resources were not allowed, reported by Orange Cyberdefense Vulnerability Disclosure Team

fixFix bypass of remote image blocking via CSS var(), reported by Geame

fixFix pre-auth arbitrary file delete via redis/memcache session poisoning bypass, reported by valent1

securityFix code injection vulnerability - remove support for code evaluation in LDAP autovalues option, reported by Glendaenri

otherEnigma: Support automatic public key lookup (import) using HKP v1 protocol (#5314)

fixManagesieve: Fix error when a mail message contains duplicate List-Id header (#10186)

otherClarified Elastic installation instructions (#10163)

featureAdded HTMLFormElement.requestSubmit() polyfill for older browsers (#10179)

fixFix so "has:attachment" search uses $HasAttachment/$HasNoAttachment keywords (#10168)

fixFix potential too long value in IMAP ID command (#10136)

fixFix redis/memcache disconnection in rcube::sleep() (#10127)

fixFix so static resources, e.g. skin_logo can be put inside the public_html directory (#10160)

fixFix so REQUEST_URI is used as a fallback if PATH_INFO is not set in static.php (#10181)

fixFix assets_path feature and remove dependency on PATH_INFO (#10185)

fixFix MySQL upgrade on MySQL < 8.0 and MariaDB < 10.5.3 (#10188)

securitySecurity: Fix stored XSS/HTML/CSS injection in subject field of the draft restore dialog

securitySecurity: Fix CSS injection bypass in HTML sanitizer via SVG

securitySecurity: Fix pre-auth SQL injection in virtuser_query plugin via preg_replace backslash escape bypass

securitySecurity: Fix SSRF bypass via specific local address URLs

securitySecurity: Fix bypass of remote image blocking via CSS var()

securitySecurity: Fix local/private URL fetch bypass when remote resources were not allowed

securitySecurity: Fix pre-auth arbitrary file delete via redis/memcache session poisoning bypass

securitySecurity: Fix code injection vulnerability - remove support for code evaluation in LDAP autovalues option

1.7.0 May 10, 2026 Release notes ↗

otherMandatory public_html/ entry-point for HTTP servers, protecting all installations better.

featureImproved OAuth2/OIDC support (e.g. support for OIDC discovery, OIDC logout).

otherMarkdown mail rendering and composing.

otherA quick actions mouse-over menu on the messages list.

otherAdvanced mail search syntax.

breakingDropped support for PHP < 8.1.

breakingDropped support for Internet Explorer.

breakingDropped support for MS SQL Server and Oracle.

breakingpublic_html/ entry-point made mandatory, all static resources are served via public_html/static.php.

breakingRemoved apc cache driver (replaced by apcu cache driver).

breakingChanged smtp_log option default value to false.

breakingRemoved contact_search_name option in favor of contactlist_name_template.

breakingReplaced session property changed by expires_at.

breakingRemoved the (insecure) virtualmin password driver.

otherBump OpenPGPjs version to 6.3.0

featureAllow cidr (subnets) in proxy_whitelist (#7103)

fixZipdownload: Fix message date time zone in mbox export (#10147)

1.6.20 Oct 19, 2026 Release notes ↗