3.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2025-53678

CVE-2025-53678: Jenkins User1st uTester Plugin vulnerability exposes unencrypted token to authenticated users

Jenkins User1st uTester Plugin 1.1 and earlier stores the uTester JWT token unencrypted in its global configuration file on the Jenkins controller, where it can be viewed by users with access to the Jenkins controller file system.

(GitHub Advisory)

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CVE-2025-53678

CVE-2025-53678:

3.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
io.jenkins.plugins:user1st-utester	maven	<= 1.1

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability, CVE-2025-53678, stems from the insecure storage of a sensitive JWT token by the Jenkins User1st uTester Plugin. The root cause is the use of a standard java.lang.String to store the jwtToken within the io.jenkins.plugins.user1st.utester.UTesterPlugin class, which is a GlobalConfiguration extension.

My analysis of the plugin's source code, specifically the UTesterPlugin.java file, confirms this. Jenkins persists the configuration of such classes to an XML file. For sensitive data, the hudson.util.Secret class should be used, as it ensures the data is encrypted on the filesystem. The plugin fails to do this.

The primary vulnerable function is io.jenkins.plugins.user1st.utester.UTesterPlugin.configure. This method is called when a Jenkins administrator saves the plugin's settings. It directly extracts the JWT token from the incoming request data (json.getString("jwtToken")) and assigns it to the jwtToken String field. The subsequent call to save() writes this plaintext token to the io.jenkins.plugins.user1st.utester.UTesterPlugin.xml configuration file on the Jenkins controller.

Other methods like the constructor UTesterPlugin(String, String) and the setter setJwtToken(String) also contribute to the vulnerability by providing mechanisms to set this sensitive token as a plaintext String, which is then persisted insecurely. Any user with access to the Jenkins controller's filesystem can therefore read this token, compromising the integration with the uTester service.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

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WAF Rule

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Reasoning

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