CVE-2025-45525: Asvd Microlight

Low severity, CVSS 2.9. EPSS: 0.1% chance of exploitation in the next 30 days.

A NULL pointer dereference vulnerability has been identified in the JavaScript library microlight version 0.0.7, a lightweight syntax highlighting library. When processing elements with non-standard CSS color values, the library fails to validate the result of a regular expression match before accessing its properties, leading to an uncaught TypeError and potential application crash. NOTE: this is disputed by multiple parties because there is no common scenario in which an adversary can insert those non-standard values.

Affected products

• Asvd Microlight: up to and including 0.0.7

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