CVE-2024-21535: Quantizor Markdown-To-Jsx

Medium severity, CVSS 6.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Versions of the package markdown-to-jsx before 7.4.0 are vulnerable to Cross-site Scripting (XSS) via the src property due to improper input sanitization. An attacker can execute arbitrary code by injecting a malicious iframe element in the markdown.

Affected products

• Quantizor Markdown-To-Jsx: before 7.4.0 (fixed in 7.4.0)

Published 2024-10-15. Last modified 2026-06-17.