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Jenkins AnchorChain Plugin Has a Cross-Site Scripting (XSS) Vulnerability

High severity GitHub Reviewed Published Mar 19, 2025 to the GitHub Advisory Database • Updated Mar 19, 2025

Package

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

Affected versions

= 1.0

Patched versions

None

Description

Jenkins AnchorChain Plugin 1.0 does not limit URL schemes for links it creates based on workspace content, allowing the javascript: scheme.

This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to control the input file for the Anchor Chain post-build step.

As of publication of this advisory, there is no fix.

References

Published by the National Vulnerability Database Mar 19, 2025
Published to the GitHub Advisory Database Mar 19, 2025
Reviewed Mar 19, 2025
Last updated Mar 19, 2025

Severity

High

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
Low
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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:L/UI:R/S:U/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(17th percentile)

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

CVE ID

CVE-2025-30196

GHSA ID

GHSA-xxrg-mg63-qfpj

Source code

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