Command injection in Roundcube Webmail - #VU141374
Published: August 9, 2026
Vulnerability identifier: #VU141374
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to command injection in the cmd_learn driver of the markasjunk plugin when invoking the learning command. A remote user can supply crafted input to execute arbitrary code.
Affected software
Roundcube Webmail
Remediation
Install security update from vendor's website.
Roundcube Webmail - addressed in versions 1.6.18, 1.7.3