Loading HuntDB...

CVE-2021-21602

UNKNOWN
Published 2021-01-13T15:55:27
Actions:

Expert Analysis

Professional remediation guidance

Get tailored security recommendations from our analyst team for CVE-2021-21602. We'll provide specific mitigation strategies based on your environment and risk profile.

No CVSS data available

Description

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier allows reading arbitrary files using the file browser for workspaces and archived artifacts by following symlinks.

Understanding This Vulnerability

This Common Vulnerabilities and Exposures (CVE) entry provides detailed information about a security vulnerability that has been publicly disclosed. CVEs are standardized identifiers assigned by MITRE Corporation to track and catalog security vulnerabilities across software and hardware products.

The severity rating (UNKNOWN) indicates the potential impact of this vulnerability based on the CVSS (Common Vulnerability Scoring System) framework. Higher severity ratings typically indicate vulnerabilities that could lead to more significant security breaches if exploited. Security teams should prioritize remediation efforts based on severity, exploit availability, and the EPSS (Exploit Prediction Scoring System) score, which predicts the likelihood of exploitation in the wild.

If this vulnerability affects products or systems in your infrastructure, we recommend reviewing the affected products section, checking for available patches or updates from vendors, and implementing recommended workarounds or solutions until a permanent fix is available. Organizations should also monitor security advisories and threat intelligence feeds for updates about active exploitation of this vulnerability.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

References

EU Vulnerability Database

Monitored by ENISA for EU cybersecurity

EU Coordination

EU Coordinated

Exploitation Status

No Known Exploitation

ENISA Analysis

Malicious code in bioql (PyPI)

Affected Products (ENISA)

jenkins project
jenkins

ENISA Scoring

CVSS Score (3.1)

6.5
/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Score

1.390
probability

Data provided by ENISA EU Vulnerability Database. Last updated: October 3, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Arbitrary file read vulnerability in workspace browsers in Jenkins

GHSA-vpjm-58cw-r8q5

Advisory Details

The file browser for workspaces, archived artifacts, and `$JENKINS_HOME/userContent/` follows symbolic links to locations outside the directory being browsed in Jenkins 2.274 and earlier, LTS 2.263.1 and earlier. This allows attackers with Job/Workspace permission and the ability to control workspace contents (e.g., with Job/Configure permission or the ability to change SCM contents) to create symbolic links that allow them to access files outside workspaces using the workspace browser. This issue is caused by an incomplete fix for SECURITY-904 / CVE-2018-1000862 in the [2018-12-08 security advisory](https://www.jenkins.io/security/advisory/2018-12-05/#SECURITY-904). Jenkins 2.275, LTS 2.263.2 no longer supports symlinks in workspace browsers. While they may still exist on the file system, they are no longer shown on the UI, accessible via URLs, or included in directory content downloads. This fix only changes the behavior of the Jenkins UI. Archiving artifacts still behaves as before.

Affected Packages

Maven org.jenkins-ci.main:jenkins-core
ECOSYSTEM: ≥0 <2.263.2
Maven org.jenkins-ci.main:jenkins-core
ECOSYSTEM: ≥2.264 <2.275

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: December 13, 2022

References

Published: 2021-01-13T15:55:27
Last Modified: 2024-08-03T18:16:23.643Z
Copied to clipboard!