High

Jenkins Assembla Plugin has an XXE vulnerability

  • Disclosed: 24.06.2026
  • Updated: 11.10.2026 13:20

Jenkins Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks when parsing responses from the configured Assembla server.

This allows attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.

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

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Java / Kotlin (Maven) org.jenkins-ci.plugins:assembla <= 1.4 no fix

References

CVSS score 7.1/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness (CWE)
CWE-918
Platform
Java / Kotlin (Maven)
Package
org.jenkins-ci.plugins:assembla
Disclosed
24.06.2026
Updated
11.10.2026 13:20

Sources and licenses

OSV / GitHub Advisory Database - GHSA-2q27-6p2h-q6r3 - CC BY 4.0

Vulnerability history: org.jenkins-ci.plugins:assembla

All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries
4
First → latest
05.2022 06.2026
Without a fix
4
Exploited in attacks
0

Severity breakdown

  • High 1
  • Medium 2
  • Low 1

Disclosures per year

  1. 2022: 1
  2. 2023: 0
  3. 2024: 0
  4. 2025: 0
  5. 2026: 3
  1. Medium · 5.4 CVE-2026-57304 <= 1.4 no fix
  2. Jenkins Assembla Plugin has an XXE vulnerability this entry
    High · 7.1 CVE-2026-57303 <= 1.4 no fix

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