CVE-2021-26085 on CISA KEV

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.

01What CISA says about this vulnerability

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.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• jira.atlassian.com — https://jira.atlassian.com/browse/CONFSERVER-67893
• packetstormsecurity.com — http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Ar…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
Atlassian	Confluence Server	unspecified, 7.5.0, unspecified
Atlassian	Confluence Data Center	unspecified, 7.5.0, unspecified

06Detection

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