CVE-2021-23180: Htmldoc Project Htmldoc

High severity, CVSS 7.8. EPSS: 1.4% chance of exploitation in the next 30 days.

A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary code and denial of service.

Affected products

• Htmldoc Project Htmldoc: up to and including 1.9.12

Published 2022-03-02. Last modified 2026-06-17.