Vulnerability Intelligence Report
Atlassian Jira Server and Data Center Path Traversal Vulnerability
CVE-2021-26086
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.
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
CVSS Base Score
5.3
MEDIUM
Exploitability:3.9
Impact Score:1.5
EPSS Probability:100.00%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-22 ↗CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Atlassian | Jira Server | unspecified < 8.5.14 (affected), 8.6.0 < unspecified (affected), unspecified < 8.13.6 (affected), 8.14.0 < unspecified (affected), unspecified < 8.16.1 (affected) |
| Atlassian | Jira Data Center | unspecified < 8.5.14 (affected), 8.6.0 < unspecified (affected), unspecified < 8.13.6 (affected), 8.14.0 < unspecified (affected), unspecified < 8.16.1 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
99.999%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Atlassian · Vendor · Australia |
| Reserved | 2021-01-25T00:00:00 |
| Published | 2021-08-16T00:15:09 |
| Patch Date | 2021-08-12 |
| Last Updated | 2025-10-21T23:25:37 |
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