Description
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a path traversal vulnerability in the squirrelmail_usercopy plugin. With the file based backend, the source path was built from the login name without rejecting path separators, so a login name containing a slash could cause files outside the configured squirrelmail_data_dir to be read and imported. Upstream fixed this in the commit “Fix unsafe use of a login name in SquirrelMail import file path”, which rejects login names containing a slash.
References6
- bugs.debian.org/1151279
- github.com/roundcube/roundcubemail/commit/15fd175d154311ca7f59c…
- github.com/roundcube/roundcubemail/commit/dbdfcac498164bcacb7ce…
- github.com/roundcube/roundcubemail/releases/tag/1.6.20
- github.com/roundcube/roundcubemail/releases/tag/1.7.5
- roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 31 · as of 8 November 2026
- CWE
- CWE-23
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.