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.
CISA Catalog
Date Added
Due Date
Vulnerability Name
Required Action
2023-10-05
2023-10-13
Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check all affected Confluence instances for evidence of compromise per vendor instructions and report any positive findings to CISA.
Date Added: 2023-10-05
Due Date: 2023-10-13
Vulnerability Name: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check all affected Confluence instances for evidence of compromise per vendor instructions and report any positive findings to CISA.