What’s Vulnerable › Vulnerabilities

CVE-2021-26086: Atlassian Jira Server and Data Center Path Traversal Vulnerability

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2024-11-12
• EPSS: 100.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-16 · updated 2026-06-17
• Weakness: CWE-22

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.

Affected products

• Atlassian Jira: before 8.5.14; from 8.6.0 before 8.13.6; from 8.14.0 before 8.16.1 — fixed in 8.13.6, 8.16.1, 8.5.14
• Atlassian Jira: before 8.5.14; from 8.6.0 before 8.13.6; from 8.14.0 before 8.16.1 — fixed in 8.13.6, 8.16.1, 8.5.14

How to fix

Upgrade to a fixed version: Atlassian Jira 8.13.6, 8.16.1, 8.5.14; Atlassian Jira 8.13.6, 8.16.1, 8.5.14. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html
• https://jira.atlassian.com/browse/JRASERVER-72695
• http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html
• https://jira.atlassian.com/browse/JRASERVER-72695
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086

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