CVE-2025-30903: Alex Mills Syntaxhighlighter Evolved

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Alex Mills SyntaxHighlighter Evolved syntaxhighlighter allows DOM-Based XSS.This issue affects SyntaxHighlighter Evolved: from n/a through <= 3.7.1.

Affected products

• Alex Mills Syntaxhighlighter Evolved: up to and including 3.7.1

Published 2025-03-27. Last modified 2026-06-17.