CVE-2026-57303

Jenkins Assembla Plugin XXE Vulnerability Allows Secret Extraction

Published Jun 24, 2026 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-2q27-6p2h-q6r3 Jenkins Assembla Plugin has an XXE vulnerability
History
Type Values Removed Values Added
Title Jenkins Assembla Plugin XXE Vulnerability Allows Secret Extraction
Type Values Removed Values Added
First Time appeared Jenkins Project
Jenkins Project jenkins Assembla Plugin
Vendors & Products Jenkins Project
Jenkins Project jenkins Assembla Plugin
Type Values Removed Values Added
Title XML External Entity Vulnerability in Jenkins Assembla Plugin Enables Secrets Exposure
Weaknesses CWE-611
Type Values Removed Values Added
Title XML External Entity Vulnerability in Jenkins Assembla Plugin Enables Secrets Exposure
Weaknesses CWE-611
Type Values Removed Values Added
Weaknesses CWE-918
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
jenkins
Published
Updated
Jun 24, 2026, 2:19 PM
Reserved
Jun 24, 2026, 8:41 AM
Status
Analyzed
Published
Jun 24, 2026, 2:17 PM
Modified
Oct 25, 2026, 10:10 PM