CVE-2023-22515: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2023-10-05. EPSS: 99.2% chance of exploitation in the next 30 days.

Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknown vulnerability in publicly accessible Confluence Data Center and Server instances to create unauthorized Confluence administrator accounts and access Confluence instances. Atlassian Cloud sites are not affected by this vulnerability. If your Confluence site is accessed via an atlassian.net domain, it is hosted by Atlassian and is not vulnerable to this issue.

Affected products

• Atlassian Confluence Data Center: from 8.0.0, before 8.3.3 (fixed in 8.3.3); from 8.4.0, before 8.4.3 (fixed in 8.4.3); from 8.5.0, before 8.5.2 (fixed in 8.5.2)
• Atlassian Confluence Server: from 8.0.0, before 8.3.3 (fixed in 8.3.3); from 8.4.0, before 8.4.3 (fixed in 8.4.3); from 8.5.0, before 8.5.2 (fixed in 8.5.2)

Published 2023-10-04. Last modified 2026-06-17.