NULL pointer dereference in Asvd Microlight
CVE-2025-45525
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.
EPSS: 0.001 (2.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Asvd Microlight — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2025-45525?
- CVE-2025-45525 is a low-severity vulnerability in Asvd Microlight, classified under NULL Pointer Dereference. CVSS score: 2.9/10. Published 2025-06-17.
- How severe is CVE-2025-45525?
- Low severity. CVSS v3 base score is 2.9 out of 10.
- Is CVE-2025-45525 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.