GitHub Enterprise Server <3.18.3 Improper Input Neutralization DOM ID Collision
CVE-2025-14046 Published on December 11, 2025
Insufficient HTML Sanitization Allows User-Controlled DOM Elements to Overwrite Server-Initialized Data Islands and Trigger Unintended Server-Side POST Requests
An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed user-supplied HTML to inject DOM elements with IDs that collided with server-initialized data islands. These collisions could overwrite or shadow critical application state objects used by certain Project views, leading to unintended server-side POST requests or other unauthorized backend interactions. Successful exploitation requires an attacker to have access to the target GitHub Enterprise Server instance and to entice a privileged user to view crafted malicious content that includes conflicting HTML elements. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18.3, 3.17.9, 3.16.12, 3.15.16, and 3.14.21.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2025-14046 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2025-14046
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Affected Versions
GitHub Enterprise Server:- Version 3.19.0 is unaffected.
- Version 3.18.0, <= 3.18.2 is affected.
- Version 3.17.0, <= 3.17.8 is affected.
- Version 3.16.0, <= 3.16.11 is affected.
- Version 3.15.0, <= 3.15.15 is affected.
- Version 3.14.0, <= 3.14.20 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.