Cross-site scripting in Roundcube Webmail - #VU141377
Published: August 9, 2026
Vulnerability identifier: #VU141377
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary script in a user's browser.
The vulnerability exists due to cross-site scripting in the "Add to address book" action when storing attacker-controlled data. A remote attacker can submit crafted data that is later rendered to execute arbitrary script in a user's browser.
Affected software
Roundcube Webmail
Remediation
Install security update from vendor's website.
Roundcube Webmail - addressed in versions 1.6.18, 1.7.3