CVE-2021-31865: Debian Linux

Medium severity, CVSS 5.3. EPSS: 1.1% chance of exploitation in the next 30 days.

Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.

Affected products

• Debian Debian Linux: version 9.0 only
• Redmine Redmine: before 4.0.9 (fixed in 4.0.9); from 4.1.0, before 4.1.3 (fixed in 4.1.3); from 4.2.0, before 4.2.1 (fixed in 4.2.1)

Published 2021-04-28. Last modified 2026-06-17.