CVE-2023-22527: Atlassian Confluence Data Center and Server Template Injection Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2024-01-24. EPSS: 100% chance of exploitation in the next 30 days.

A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance. Customers using an affected version must take immediate action. Most recent supported versions of Confluence Data Center and Server are not affected by this vulnerability as it was ultimately mitigated during regular version updates. However, Atlassian recommends that customers take care to install the latest version to protect their instances from non-critical vulnerabilities outlined in Atlassian’s January Security Bulletin.

Affected products

• Atlassian Confluence Data Center: from 8.0.0, before 8.5.4 (fixed in 8.5.4); version 8.7.0 only
• Atlassian Confluence Server: from 8.0.0, before 8.5.4 (fixed in 8.5.4)

Published 2024-01-16. Last modified 2026-06-17.