XSS in Github Enterprise Server

CVE-2025-3246

An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed cross-site scripting in GitHub Markdown that used `$$..$$` math blocks. Exploitation required access to the target GitHub Enterprise Server instance and privileged user interaction with the malicious elements. This vulnerability affected version 3.16.1 of GitHub Enterprise Server and was fixed in version 3.16.2. This vulnerability was reported via the GitHub Bug Bounty program.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (21.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-3246?
CVE-2025-3246 is a high-severity vulnerability in Github Enterprise Server, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2025-04-17.
How severe is CVE-2025-3246?
High severity. CVSS v3 base score is 7.6 out of 10.
Is CVE-2025-3246 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.