CVE-2025-49113

Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php, leading to PHP Object Deserialization.

Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php, leading to PHP Object Deserialization.

Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php, leading to PHP Object Deserialization.

A Post-Auth RCE was announced and fixed in the latest release.

This update for roundcubemail fixes the following issues:

Changes in roundcubemail:

Update to 1.6.20:

This is a security update to the version 1.6 of Roundcube Webmail. It provides fixes to recently reported security vulnerabilities:

• Fix IMAP command injection via CRLF in _uid parameter of mail/headers and mail/viewsource action, reported by Wahab "NeoX" K.
• Fix bug where an alias login wasn't qualified by IMAP host, reported by Milan Hoppe.
• Add a size limit to the CSS proxy content processing, reported by Milan Hoppe.
• Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96, reported by dizconnect.
• Fix remote content blocking bypass via SVG SMIL by attribute, reported by Milan Hoppe.
• Fix remote content blocking bypass via CSS escapes in FuncIRI attributes (again), reported by Milan Hoppe.
• Fix passing potentally unsafe attachment content into ImageMagick on image resize, reported by Paulos Yibelo
• Fix mail header injection via the From display-name in the Bounce (resend) action, reported by Clay.
• Fix mail header injection via References/In-Reply-To/Message-ID/From parameters, reported by Sunil Tripathy.
• Fix object injection primitive in rcube_session::unserialize() via "!"-prefixed session keys, reported by Oli Z.
• Fix ImageMagick resource limits bypass by GD fallback during thumbnail generation, reported by GoldenSW.
• Fix CSS scoping bypass in HTML messages using at-rules, reported by GoldenSW.
• Fix bug where deprecated action aliases bypassed disabled_actions setting, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.
• Fix IMAP command injection via CRLF in _flag parameter of mail/mark action, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.
• Fix CSRF validation bypass in the mark-as-junk action, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.
• Fix XSS issue in handling of password driver error responses, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.
• Fix mail header injection via subject of a message forwarded as attachment, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.
• Fix mail header injection via media type in an inline image data URI, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.
• Fix bug where Password Modoboa driver could change password for another account, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.
• Fix unsafe use of a login name in SquirrelMail import file path, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5.

This version is considered stable and we recommend to update all productive installations of Roundcube with it. Please do backup your data before updating!

Update to 1.6.19:

This is a security update to the version 1.6 of Roundcube Webmail. It provides fixes to recently reported security vulnerabilities:

• Fix CSS declaration smuggling via un-encoded ampersand emission, reported by Zach Hanley of Horizon3.ai
• Fix CSS property injection via body background attribute, reported by zenithhostingevan
• Fix email header injection via bare CR in the subject field, reported by CVE-Hunter-Leo
• Fix email header injection via C-escape \r in the recipient display name, reported by dogeshark
• Fix email header injection via identity's organization field, reported by dogeshark
• Fix zero-click stored XSS via TNEF MIME tag injection in the attachment URL, reported by nakko
• Fix XSS in the HTML editor using text/enriched part content, reported by Joshua Rogers
• Fix cross-user access in contact group membership (add/remove) in the SQL address book, reported by Joshua Rogers
• Fix is_local_url() bypass via trailing-dot FQDN in stylesheet URL, reported by nept1337
• Fix remote content blocking bypass via CSS escapes in FuncIRI attributes, reported by neoxed
• Fix remote-content blocker bypass via SVG SMIL src animation
• Fix SSRF bypass in Roundcube CSS proxy via hexadecimal IPv6-mapped IPv4 addresses, reported by faceless0x7 and Harish Annavisamy

This version is considered stable and we…

It was discovered that Roundcube Webmail did not properly sanitize the _from parameter in a URL, leading to PHP Object Deserialization. A remote attacker could possibly use this issue to execute arbitrary code.