Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability

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. Aug 2, 2021 · Catalog

   Detected

   Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

2. Mar 28, 2022 · CISA KEV

   Known exploited

   Apply updates per vendor instructions.

3. Apr 18, 2022 · CISA KEV

   Remediation due

   Apply updates per vendor instructions.

4. Jun 16, 2026 · Catalog

   Updated

   Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

Affected

• cpe atlassian/confluence data centerversion unspecified
• cpe atlassian/confluence serverversion unspecified
• vendor Atlassian Confluence Serverversion unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2021-26085

  Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a pre-authorization arbitrary file read vulnerability in the /s/ endpoint.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-26085

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-26085

  30-day exploitation probability 99.9%

  first.org
• Exploit DatabasePublic exploit reference50377

  Public archive entry. The exploit body is not stored here.

  exploit-db.com
• NIST NVDVulnerability recordCVE-2021-26085

  Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

  nvd.nist.gov
• Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html

  Packet Storm link already published on the finding.

  packetstormsecurity.com

References

• Exploit · packetstormsecurity.com
• Issue Tracking · jira.atlassian.com
• CISA note · nvd.nist.gov
• US Government Resource · cisa.gov