CVE-2023-22518: Atlassian Confluence Data Center and Server Improper Authorization Vulnerability

Required action (CISA's text)

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Description (NVD)

Atlassian Confluence Data Center and Server contain an improper authorization vulnerability that can result in significant data loss when exploited by an unauthenticated attacker. There is no impact on confidentiality since the attacker cannot exfiltrate any data.

SOURCES

• CISA KEVCISA Known Exploited Vulnerabilities catalog

Other Atlassian flaws

• CVE-2026-21589: Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability
• CVE-2021-26086: Atlassian Jira Server and Data Center Path Traversal Vulnerability
• CVE-2023-22527: Atlassian Confluence Data Center and Server Template Injection Vulnerability
• CVE-2023-22515: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
• CVE-2022-36804: Atlassian Bitbucket Server and Data Center Command Injection Vulnerability

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.