Description
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a remote content blocking bypass. rcube_washtml inspected the SVG SMIL animation attributes `to`, `from` and values for URIs, but not `by`; so markup such as in an HTML message caused remote content to be loaded without the user's consent, disclosing the client IP address and confirming that the message was opened. Upstream fixed this in the commit “Fix remote-content blocker bypass via SVG SMIL `by` attribute”.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Roundcube Webmail
Default version status: unaffected
1.6.0 to < 1.6.20affected1.7.0 to < 1.7.5affected
References
- https://bugs.debian.org/1151279 ↗
- https://github.com/roundcube/roundcubemail/commit/96d993b4ac57166a094b5774f4761e0b905d9a05 ↗
- https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5 ↗
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.5 ↗
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.20 ↗
- https://github.com/roundcube/roundcubemail/commit/2b6ff79d8b14f94b0ff04765b7f02dbfdfe98efa ↗