Description
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a CSRF validation bypass in the mark-as-junk action of the markasjunk plugin. The plugin read the _uid parameter from POST data but passed it to rcmail::get_uids() without constraining the input mode, so values re-read inside that helper could be taken from the query string and the action carried out without a valid CSRF token. Upstream fixed this in the commit “Fix CSRF validation bypass in the mark-as-junk action”, which passes rcube_utils::INPUT_POST explicitly.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Roundcube | Webmail | >= 1.6.0, < 1.6.20; >= 1.7.0, < 1.7.5 |
References
- https://bugs.debian.org/1151279
- https://github.com/roundcube/roundcubemail/commit/15b0dc0d6e5712310c8f663577361bf8132a7f81
- https://github.com/roundcube/roundcubemail/commit/6ea2bbe356099c9da98eabcfeafd8d6aa2d67b3d
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.20
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.5
- https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5
Timeline
- Published
- Oct 22, 2026
- Last modified
- Oct 22, 2026
- NVD status
- Undergoing Analysis