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Cross-Site Request Forgery in the Jenkins Claim plugin

Moderate severity GitHub Reviewed Published Jun 16, 2021 to the GitHub Advisory Database • Updated Oct 27, 2023

Package

maven org.jenkins-ci.plugins:claim (Maven)

Affected versions

< 2.18.2

Patched versions

2.18.2

Description

Jenkins Claim Plugin 2.18.1 and earlier does not require POST requests for the form submission endpoint assigning claims, resulting in a cross-site request forgery (CSRF) vulnerability.

This vulnerability allows attackers to change claims.

Jenkins Claim Plugin 2.18.2 requires POST requests for the affected HTTP endpoint.

References

Published by the National Vulnerability Database Feb 24, 2021
Reviewed May 7, 2021
Published to the GitHub Advisory Database Jun 16, 2021
Last updated Oct 27, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS score

0.053%
(23rd percentile)

Weaknesses

CVE ID

CVE-2021-21620

GHSA ID

GHSA-4ffq-6g62-j4v4

Source code

Credits

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