Cross-site request forgery in Roundcube Webmail - #VU162693
Published: November 9, 2026
Vulnerability identifier: #VU162693
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-352
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass cross-site request forgery validation and potentially perform unintended actions through another user's session.
The vulnerability exists due to incomplete cross-site request forgery validation in Roundcube Webmail's POST request handling when processing file-only submissions. A remote attacker can induce a signed-in user's browser to submit a crafted file-only POST request to bypass validation and potentially trigger an unintended action.
Affected software
Roundcube Webmail
Remediation
Install security update from vendor's website.
Roundcube Webmail - addressed in versions 1.6.21, 1.7.6