Description
Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1 has Pre-authentication SQL injection in the virtuser_query plugin via a preg_replace() backslash escape bypass.
References6
- github.com/roundcube/roundcubemail/commit/3406183a9976e36f992d3…
- github.com/roundcube/roundcubemail/commit/87124cc7136a48b5fa9d2…
- github.com/roundcube/roundcubemail/releases/tag/1.6.16
- github.com/roundcube/roundcubemail/releases/tag/1.7.1
- roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1
- www.openwall.com/lists/oss-security/2026/06/03/17
Metrics
- CVSS 3.1
-
8.1
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 2% percentile: 78 · as of 14 November 2026
- CWE
- CWE-89
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.