Cross-site scripting in Roundcube Webmail - #VU132213
Published: May 25, 2026
Vulnerability identifier: #VU132213
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Roundcube
Affected software:
Roundcube Webmail
Roundcube Webmail
Detailed vulnerability description
The vulnerability allows a remote attacker to inject arbitrary style content.
The vulnerability exists due to improper input validation in the HTML sanitizer when processing SVG animate elements with attributeName="style". A remote attacker can supply specially crafted HTML or SVG content to inject arbitrary style content.
Remediation
Install security update from vendor's website.