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Vulnerabilities

Vulnerability · CVE-2023-22515

Atlassian Confluence Data Center and Server Broken Access Control Vulnerability

Published Oct 4, 2023 · catalog updated Jun 16, 2026 · Atlassian Confluence Server and Data Center

Patch now

CVE-2023-22515 is in the CISA known-exploited catalog, due Oct 13, 2023. Confirm Atlassian Confluence Server and Data Center against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.22%
Remediation
Remediation guidance
Affected products
cpe atlassian/confluence data center · cpe atlassian/confluence server · vendor Atlassian Confluence Data Center and Server · vendor Atlassian Confluence Server and Data Center

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe atlassian/confluence data centerversion unspecified
  • cpe atlassian/confluence serverversion unspecified
  • vendor Atlassian Confluence Data Center and Serverversion unspecified
  • vendor Atlassian Confluence Server and Data Centerversion unspecified

How to fix CVE-2023-22515

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2023-22515 is in the CISA known-exploited catalog, due Oct 13, 2023. Confirm Atlassian Confluence Server and Data Center against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. 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.

What should an analyst verify?

CWE-20: Improper Input Validation. EPSS 99.22%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 4, 2023 · Catalog

    Detected

    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 i

  2. Oct 5, 2023 · CISA KEV

    Known exploited

    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.

  3. Oct 13, 2023 · CISA KEV

    Remediation due

    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.

  4. Jun 16, 2026 · Catalog

    Updated

    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 i

Sources

  • CISA KEVConfirmed exploitationCVE-2023-22515

    Atlassian Confluence Data Center and Server contains a broken access control vulnerability that allows an attacker to create unauthorized Confluence administrator accounts and access Confluence.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2023-22515

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-22515

    30-day exploitation probability 99.2%

    first.org
  • Metasploit ModulesPublic exploit moduleauxiliary_admin/http/atlassian_confluence_auth_bypass

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/atlassian_confluence_rce_cve_2023_22515

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2023-22515

    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

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/175225/Atlassian-Confluence-Unauthenticated-Remote-Code-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2023-22515

    Atlassian Confluence Data Center and Server contains a broken access control vulnerability that allows an attacker to create unauthorized Confluence administrator accounts and access Confluence.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.