CVE-2011-1492: Roundcube Webmail

Medium severity, CVSS 5.5. EPSS: 1.8% chance of exploitation in the next 30 days.

steps/utils/modcss.inc in Roundcube Webmail before 0.5.1 does not properly verify that a request is an expected request for an external Cascading Style Sheets (CSS) stylesheet, which allows remote authenticated users to trigger arbitrary outbound TCP connections from the server, and possibly obtain sensitive information, via a crafted request.

Affected products

• Roundcube Webmail: up to and including 0.5; version 0.1 only; version 0.1.1 only; version 0.2 only; version 0.2.1 only; version 0.3 only; …

Published 2011-04-08. Last modified 2026-06-16.