{"id":"CVE-2021-26085","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-26085","generatedAt":"2026-10-31T15:00:57.618Z","title":"Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability","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.","published":"2021-08-03T00:15:09.000Z","lastModified":"2026-06-17T03:42:50.000Z","status":"Analyzed","sourceIdentifier":"security@atlassian.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-425"],"affected":["atlassian/confluence data center","atlassian/confluence server"],"epss":{"score":0.99937,"percentile":0.99971,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2022-03-28","dueDate":"2022-04-18","knownRansomwareCampaignUse":"Known","notes":"Apply updates per vendor instructions.\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-26085"},"exploits":{"count":1,"verified":false,"firstPublished":"2021-10-05","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":50377,"kind":"exploit","title":"Atlassian Confluence 7.12.2 - Pre-Authorization Arbitrary File Read","url":"https://www.exploit-db.com/exploits/50377","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/java/webapps/50377.txt","file":"exploits/java/webapps/50377.txt","published":"2021-10-05","added":"2021-10-05","updated":"2021-10-05","author":"Mayank Deshmukh","type":"webapps","platform":"java","port":null,"verified":false,"codes":["CVE-2021-26085"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 18 April 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"security@atlassian.com"},{"url":"https://jira.atlassian.com/browse/CONFSERVER-67893","tags":["Issue Tracking","Vendor Advisory"],"source":"security@atlassian.com"},{"url":"http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://jira.atlassian.com/browse/CONFSERVER-67893","tags":["Issue Tracking","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26085","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-26085","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}