November 7, 2023 · Applied Cybernetics Group
CVE-2023-22518 — Atlassian Confluence Data Center and Server
known ransomware use
Atlassian Confluence Data Center and Server Improper Authorization Vulnerability
- Added to KEV
2023-11-07- Federal due date
2023-11-28- Vendor
- Atlassian
- Product
- Confluence Data Center and Server
- EPSS
- 100.0th percentile (score 0.944, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2023-22518
CISA short description
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.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.