CVE-2025-9540: Unknown Markup Markdown

Medium severity, CVSS 4.7. EPSS: 0.2% chance of exploitation in the next 30 days.

The Markup Markdown WordPress plugin before 3.20.10 allows links to contain JavaScript which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.

Affected products

• Unknown Markup Markdown: before 3.20.10 (fixed in 3.20.10)

Published 2025-09-22. Last modified 2026-06-17.