# CVE-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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-26085
- CVSS: 5.3
- Known exploited: yes, in CISA KEV since 2022-03-28; CISA due date 2022-04-18; known ransomware use
- EPSS: 99.94% (percentile 100.0)
- Public exploit code: 1 on Exploit-DB · 1 GitHub proof of concept · 1 Nuclei template (first 2021-10-05)
- CISA SSVC: exploitation active, automatable yes, technical impact partial (assessed 2025-02-07)
- Weakness: CWE-425
- Published: 2021-08-03

## Affected versions

- Atlassian Confluence Data Center: affected < 7.4.10; >= 7.5.0 and < unspecified; < 7.12.3
- Atlassian Confluence Server: affected < 7.4.10; >= 7.5.0 and < unspecified; < 7.12.3

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://jira.atlassian.com/browse/CONFSERVER-67893
- [other] http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26085

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.