CVE-2021-37156: Redmine

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.

Affected products

• Redmine Redmine: version 4.2.0 only; version 4.2.1 only

Published 2021-08-05. Last modified 2026-06-17.