CVE-2021-38562: Bestpractical Request Tracker

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

Best Practical Request Tracker (RT) 4.2 before 4.2.17, 4.4 before 4.4.5, and 5.0 before 5.0.2 allows sensitive information disclosure via a timing attack against lib/RT/REST2/Middleware/Auth.pm.

Affected products

• Bestpractical Request Tracker: from 4.2.0, before 4.2.17 (fixed in 4.2.17); from 4.4.0, before 4.4.5 (fixed in 4.4.5); from 5.0.0, before 5.0.2 (fixed in 5.0.2)
• Debian Debian Linux: version 9.0 only
• Fedoraproject Fedora: version 35 only

Published 2021-10-18. Last modified 2026-06-17.