CVE-2021-26086

5.3 MEDIUM CISA KEV - Actively Exploited
Published: August 16, 2021 Modified: October 24, 2025
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html
Source: security@atlassian.com
Exploit Third Party Advisory VDB Entry
https://jira.atlassian.com/browse/JRASERVER-72695
Source: security@atlassian.com
Issue Tracking Vendor Advisory
http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Third Party Advisory VDB Entry
https://jira.atlassian.com/browse/JRASERVER-72695
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

5 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
94.2%
100th percentile
Exploitation Status
Actively Exploited
Remediation due: 2024-12-03

Weaknesses (CWE)

CWE-22 CWE-22

Affected Vendors

atlassian

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