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 Packages

npm markdown-to-jsx

Affected versions: 0 (fixed in 7.4.0)

Related CVEs

CVE-2024-21535

Key Information

GHSA ID

GHSA-4wx3-54gh-9fr9

Published

October 15, 2024 6:30 AM

Last Modified

October 15, 2024 5:36 PM

CVSS Score

5.0 /10

Primary Ecosystem

npm

Primary Package

markdown-to-jsx

GitHub Reviewed

✓ Yes

Dataset

Last updated: June 15, 2025 6:24 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.