CVE-2021-21659: XXE vulnerability in Jenkins URLTrigger Plugin
8.1
CVSS Score
3.1
Basic Information
CVE ID
GHSA ID
EPSS Score
0.78457%
CWE
Published
5/24/2022
Updated
10/27/2023
KEV Status
No
Technology
Java
Technical Details
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| org.jenkins-ci.plugins:urltrigger | maven | <= 0.48 | 0.49 |
Vulnerability Intelligence
Miggo AI
Root Cause Analysis
The vulnerability stems from insecure XML parser configuration in the URLTrigger Plugin. The advisory explicitly states the parser wasn't configured to prevent XXE, and the fix involved disabling external entity resolution. The most likely vulnerable functions are those handling XML content parsing from URLs. The 'checkURL' method would initiate content retrieval/processing, while 'XMLContentType#parseContent' would directly handle XML parsing. Both would require secure parser configuration (disabling DTDs/external entities) to mitigate XXE, which was missing in vulnerable versions.