CVE-2025-14046

Description

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.

CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
github	enterprise_server	< 3.14.21
github	enterprise_server	3.15.0 — 3.15.16
github	enterprise_server	3.16.0 — 3.16.12
github	enterprise_server	3.17.0 — 3.17.9
github	enterprise_server	3.18.0 — 3.18.3

References

Other References

https://docs.github.com/en/[email protected]/admin/release-notes#3.14.21 https://docs.github.com/en/[email protected]/admin/release-notes#3.15.16 https://docs.github.com/en/[email protected]/admin/release-notes#3.16.12 https://docs.github.com/en/[email protected]/admin/release-notes#3.17.9 https://docs.github.com/en/[email protected]/admin/release-notes#3.18.3

Frequently Asked Questions

What is CVE-2025-14046? +

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. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2025-14046? +

CVE-2025-14046 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-14046? +

CVE-2025-14046 affects products from github, specifically: enterprise_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-14046? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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