CVE-2021-27733: JetBrains Youtrack

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

In JetBrains YouTrack before 2020.6.6441, stored XSS was possible via an issue attachment.

Affected products

• JetBrains Youtrack: before 2020.6.6441 (fixed in 2020.6.6441)

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