Roundcube Releases 1.6.20 and 1.7.5 Fix 20 Bugs; Older SQL Injection Under Active Exploitation
On 19 October 2026, the Roundcube project released versions 1.6.20 and 1.7.5, which address 20 reported vulnerabilities, and urged all production installations of the 1.6.x and 1.7.x branches to update. Separately, Singapore's Cyber Security Agency warned on 3 October that an older pre-authentication SQL injection flaw in Roundcube's virtuser_query plugin was reportedly being actively exploited. That flaw affects versions before 1.6.16 and 1.7.x before 1.7.1, and was fixed in May 2026, with CSA rating it 8.1 under CVSS v3.1. Administrators are advised to check their installed version, remove unused plugins, back up their data, and apply the appropriate update promptly, since servers untouched since spring remain the most exposed.
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