Summary
generated automatically from NVD dataCVE-2023-22518 is an improper authorization flaw (CWE-863) in Atlassian Confluence Data Center and Server, affecting all versions. An unauthenticated attacker can reset a Confluence instance and create an administrator account, then perform any administrative action, risking full loss of confidentiality, integrity and availability. Atlassian Cloud sites on atlassian.net are not affected. It is rated CRITICAL (CVSS v3.1 score 9.8) and is listed in CISA's KEV catalog, with known use in ransomware campaigns.
NVD description
All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. This Improper Authorization vulnerability allows an unauthenticated attacker to reset Confluence and create a Confluence instance administrator account. Using this account, an attacker can then perform all administrative actions that are available to Confluence instance administrator leading to - but not limited to - full loss of confidentiality, integrity and availability. 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.
⚠️ Actively exploited — CISA KEV
This CVE was added to CISA's Known Exploited Vulnerabilities catalog on 2023-11-07. It is confirmed exploited in the wild and must be patched as a priority.
Remediation deadline (US federal agencies): 2023-11-28
Used in known ransomware campaigns.
EPSS · FIRST.org
100.0%probability of exploitation in the next 30 days
Higher than 99% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-19, recomputed daily by FIRST.org.
CVSS v3.1 Score
Information
- Published
- 31 oct. 2023
- Updated
- 17 juin 2026
- Status
- Analyzed
- Source
- security@atlassian.com
Affected products
Weaknesses (CWE)
References (7)
- http://packetstormsecurity.com/files/176264/Atlassian-Confluence-Improper-Authorization-Code-Execution.htmlExploitThird Party AdvisoryVDB Entry
- https://confluence.atlassian.com/pages/viewpage.action?pageId=1311473907Issue TrackingMitigationVendor Advisory
- https://jira.atlassian.com/browse/CONFSERVER-93142Issue TrackingMitigationVendor Advisory
- http://packetstormsecurity.com/files/176264/Atlassian-Confluence-Improper-Authorization-Code-Execution.htmlExploitThird Party AdvisoryVDB Entry
- https://confluence.atlassian.com/pages/viewpage.action?pageId=1311473907Issue TrackingMitigationVendor Advisory
- https://jira.atlassian.com/browse/CONFSERVER-93142Issue TrackingMitigationVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22518US Government Resource
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