What’s Vulnerable › Vulnerabilities

CVE-2021-23180

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-03-02 · updated 2026-06-17
• Weakness: CWE-476

Description

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: through 1.9.12

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1967041
• https://github.com/michaelrsweet/htmldoc/commit/19c582fb32eac74b57e155cffbb529377a9e751a
• https://github.com/michaelrsweet/htmldoc/issues/418
• https://ubuntu.com/security/CVE-2021-23180
• https://bugzilla.redhat.com/show_bug.cgi?id=1967041
• https://github.com/michaelrsweet/htmldoc/commit/19c582fb32eac74b57e155cffbb529377a9e751a
• https://github.com/michaelrsweet/htmldoc/issues/418
• https://ubuntu.com/security/CVE-2021-23180

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