In JetBrains YouTrack Confluence plugin versions before 1.8.1.3, it was possible to achieve Server Side Template Injection. The attacker could add an Issue macro to the page in Confluence, and use a combination of a valid id field and specially crafted code in the link-text-template field to execute code remotely.
Severity
CVSS 3.0
9.8 critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
2.2% chance of exploitation in the next 30 days; higher than 82% of CVEs (scores of 2026-10-31)