Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
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 si
What happened
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 lists it as exploited, added 05 Oct 2023.
Does it affect you
Names Atlassian Confluence. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Follow the vendor advisory for the fixed release and any interim mitigation.
confluence.atlassian.com - Follow the vendor advisory for the fixed release and any interim mitigation.
confluence.atlassian.com - Follow the vendor advisory for the fixed release and any interim mitigation.
jira.atlassian.com - 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.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- confluence
- Atlassian Confluence: 8.0.0 up to the fix in 8.3.3
The record
- NVD status
- Analyzed
- Published
- 04 Oct 2023, last modified 17 Jun 2026 (NVD)
- Severity
- CVSS 3.1 base score 9.8, Critical — computed here from the vector; NVD states 9.8.
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-20 Improper Input Validation (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 05 Oct 2023; federal remediation due 13 Oct 2023. CISA records known use in ransomware campaigns. CISA entry
- Vendor
- Atlassian · Confluence Data Center and Server (CISA)
References on the NVD record
- confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515Vendor Advisory
- confluence.atlassian.com/pages/viewpage.action?pageId=1295682276Vendor Advisory
- jira.atlassian.com/browse/CONFSERVER-92475Issue TrackingVendor Advisory
- packetstormsecurity.com/files/175225/Atlassian-Confluence-Unauthenticated-Remote-Code-Execution.htmlExploitThird Party AdvisoryVDB Entry
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22515US Government Resource
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.