Actively exploited in the wild
Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability
Atlassian - Confluence Server · Listed in the CISA KEV since 2022-03-28. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2021-26085
MediumCVSS 5.3KEVSummary
A vulnerability in Atlassian Confluence Server allows remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read in the /s/ endpoint. Affected versions are before 7.4.10 and from 7.5.0 before 7.12.3.
Risk Assessment
An attacker can access sensitive files and information without authentication, potentially leading to data leakage and further attacks.
Recommendation
Update Confluence Server to version 7.4.10 or 7.12.3 (or later) to fix the vulnerability.
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Original NVD description (English source)
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.