CVE-2025-45525

Severity: low (CVSS 2.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-17 · updated 2026-06-17
Weakness: CWE-476

Description

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: through 0.0.7

References

https://gist.github.com/Rootingg/843368931f70886bed3cf982f10a4424
https://github.com/github/advisory-database/pull/5730

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