Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-26085

CVE-2021-26085MEDIUM

Atlassian Confluence Server

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS    %ile   KEV
   N   L   N   N  U  L  N  N    5.3   .9994   100.0   YES

AFFECTED
  Product                 Versions       Fixed
  Confluence Server       unspecified –  —
  Confluence Data Center  unspecified –  —

TIMELINE
  Jan 25  Reserved by atlassian
  Aug 3   Published (CNA: atlassian)
  Mar 28  Added to CISA KEV, remediation due 2022-04-18

CWE-425 · CNA: atlassian · CVSS v3.1 · 3 references · KEV due April 18, 2022

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
January 25, 2021	Reserved	Reserved by atlassian
August 3, 2021	Published	Published (CNA: atlassian)
March 28, 2022	KEV ADDED	Added to CISA KEV, remediation due 2022-04-18

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Atlassian	Confluence Server	—	unspecified	—
Atlassian	Confluence Data Center	—	unspecified	—

Weaknesses

CWE-425

References (3)

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

Authoritative record: CVE-2021-26085 at cve.org

Vendors: atlassian

Weaknesses: CWE-425

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-26085 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.