Use After Free in Htacg Tidy

CVE-2021-33391

An issue in HTACG HTML Tidy v5.7.28 allows attacker to execute arbitrary code via the -g option of the CleanNode() function in gdoc.c.

Vulnerability class: Use-After-Free

EPSS: 0.011 (63.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Htacg Tidy — versions 5.7.28
Linux Linux_kernel
N/a — versions n/a

Weakness classification (CWE)

CWE-416 — Use After Free

References

cve@mitre.org (Exploit, Patch)

Frequently asked questions

What is CVE-2021-33391?: CVE-2021-33391 is a critical-severity vulnerability in Htacg Tidy, classified under Use After Free. CVSS score: 9.8/10. Published 2023-02-17.
How severe is CVE-2021-33391?: Critical severity. CVSS v3 base score is 9.8 out of 10.