CVE-2021-31903: JetBrains Youtrack

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

In JetBrains YouTrack before 2021.1.9819, a pull request's title was sanitized insufficiently, leading to XSS.

Affected products

• JetBrains Youtrack: before 2021.1.9819 (fixed in 2021.1.9819)

Published 2021-05-11. Last modified 2026-06-17.