CVE-2021-26086
Atlassian Jira Server and Data Center Path Traversal Vulnerability
Does this matter?
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.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 100.00% probability · 100th percentile
- CISA KEV
- Listed 12 November 2024 · due 3 December 2024
- Weakness
- CWE-22
- Affected
- atlassian/jira data center · atlassian/jira server
- Source
- security@atlassian.com
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://jira.atlassian.com/browse/JRASERVER-72695 ; https://nvd.nist.gov/vuln/detail/CVE-2021-26086
References
- http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.htmlExploit, Third Party Advisory, VDB Entry
- https://jira.atlassian.com/browse/JRASERVER-72695Issue Tracking, Vendor Advisory
- http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.htmlExploit, Third Party Advisory, VDB Entry
- https://jira.atlassian.com/browse/JRASERVER-72695Issue Tracking, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.