CVEvulnerability

CVE-2021-26086

5.3 MEDIUM Known exploited Published 2021-08-16 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Atlassian Jira Server and Data Center Path Traversal Vulnerability — Atlassian Jira Server and Data Center

Atlassian Jira Server and Data Center contain a path traversal vulnerability that allows a remote attacker to read particular files in the /WEB-INF/web.xml endpoint.

Added to KEV: 2024-11-12
Remediation due: 2024-12-03
Ransomware use: Unknown
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes: https://jira.atlassian.com/browse/JRASERVER-72695 ; https://nvd.nist.gov/vuln/detail/CVE-2021-26086

Status: Analyzed
Published: 2021-08-16
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0 ([email protected]): 5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
Weaknesses: 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 configurations

• atlassian jira data center (< 8.5.14) • atlassian jira data center (>= 8.6.0 < 8.13.6) • atlassian jira data center (>= 8.14.0 < 8.16.1) • atlassian jira server (< 8.5.14) • atlassian jira server (>= 8.6.0 < 8.13.6) • atlassian jira server (>= 8.14.0 < 8.16.1)

Weakness · CWE (1)

CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness

References