CVE-2019-3396: Atlassian Confluence Server and Data Center Server-Side Template Injection Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 99.9% chance of exploitation in the next 30 days.

The Widget Connector macro in Atlassian Confluence Server before version 6.6.12 (the fixed version for 6.6.x), from version 6.7.0 before 6.12.3 (the fixed version for 6.12.x), from version 6.13.0 before 6.13.3 (the fixed version for 6.13.x), and from version 6.14.0 before 6.14.2 (the fixed version for 6.14.x), allows remote attackers to achieve path traversal and remote code execution on a Confluence Server or Data Center instance via server-side template injection.

Affected products

• Atlassian Confluence Server: before 6.6.12 (fixed in 6.6.12); from 6.7.0, before 6.12.3 (fixed in 6.12.3); from 6.13.0, before 6.13.3 (fixed in 6.13.3); from 6.14.0, before 6.14.2 (fixed in 6.14.2)

Published 2019-03-25. Last modified 2026-06-17.