CVE-2026-57303
Received Received - Intake
Jenkins Assembla Plugin XXE Vulnerability

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: Jenkins Project

Description
Jenkins Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks, allowing attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-24
AI Q&A
2026-06-24
EPSS Evaluated
N/A
NVD
CVE-2026-57303
EUVD
EUVD-2026-38784
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
jenkinsci assembla_plugin to 1.4 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
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Executive Summary

The Jenkins Assembla Plugin version 1.4 and earlier has a security flaw because it does not properly configure its XML parser to prevent XML external entity (XXE) attacks.

This means that an attacker who can control the responses from the configured Assembla server can exploit this vulnerability to extract sensitive information from the Jenkins controller or perform server-side request forgery.

Impact Analysis

This vulnerability can allow attackers to extract secrets from the Jenkins controller, which may include sensitive configuration data or credentials.

Additionally, attackers can perform server-side request forgery (SSRF), potentially allowing them to make unauthorized requests from the Jenkins server to internal or external systems.

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