CVE-2021-23180

7.8 highEPSS 1.4%

High (7.8) in htmldoc project htmldoc. 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.

Severity

CVSS 3.1

7.8 high

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 71% of CVEs (scores of 2026-10-31)
CWE: CWE-476
Published: 2022-03-02
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

htmldoc_project:htmldoc

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

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