CVE-2021-44025: Debian Linux

Medium severity, CVSS 6.1. EPSS: 1.2% chance of exploitation in the next 30 days.

Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to XSS in handling an attachment's filename extension when displaying a MIME type warning message.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 33 only; version 34 only
• Roundcube Webmail: before 1.3.17 (fixed in 1.3.17); from 1.4.0, before 1.4.12 (fixed in 1.4.12)

Published 2021-11-19. Last modified 2026-06-17.