Cross-site scripting in Roundcube Webmail - #VU156152
Published: October 19, 2026
Vulnerability identifier: #VU156152
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/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 user to execute arbitrary script in a user's browser within the webmail application's origin.
The vulnerability exists due to improper neutralization of script-capable content in password driver error response handling when displaying an error. A remote user can introduce crafted content into a password driver error response to cause script execution when the response is rendered in a user's browser.
Affected software
Roundcube Webmail
Remediation
Install security update from vendor's website.
Roundcube Webmail - addressed in versions 1.6.20, 1.7.5