{"id":"CVE-2021-26086","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-26086","generatedAt":"2026-10-31T13:58:05.378Z","title":"Atlassian Jira Server and Data Center Path Traversal Vulnerability","description":"Affected versions of Atlassian Jira Server and Data Center allow remote attackers to read particular files via a path traversal vulnerability in the /WEB-INF/web.xml endpoint. The affected versions are before version 8.5.14, from version 8.6.0 before 8.13.6, and from version 8.14.0 before 8.16.1.","published":"2021-08-16T01:15:06.000Z","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-22"],"affected":["atlassian/jira data center","atlassian/jira server"],"epss":{"score":0.99999,"percentile":0.99993,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2024-11-12","dueDate":"2024-12-03","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.\nhttps://jira.atlassian.com/browse/JRASERVER-72695 ; https://nvd.nist.gov/vuln/detail/CVE-2021-26086"},"exploits":{"count":1,"verified":false,"firstPublished":"2021-10-06","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":50380,"kind":"exploit","title":"Atlassian Jira Server Data Center 8.16.0 - Arbitrary File Read","url":"https://www.exploit-db.com/exploits/50380","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/50380.txt","file":"exploits/multiple/webapps/50380.txt","published":"2021-10-06","added":"2021-10-06","updated":"2021-10-28","author":"Mayank Deshmukh","type":"webapps","platform":"multiple","port":null,"verified":false,"codes":["CVE-2021-26086"],"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 3 December 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"security@atlassian.com"},{"url":"https://jira.atlassian.com/browse/JRASERVER-72695","tags":["Issue Tracking","Vendor Advisory"],"source":"security@atlassian.com"},{"url":"http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://jira.atlassian.com/browse/JRASERVER-72695","tags":["Issue Tracking","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-26086","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."}