CVE-2021-33391

CRITICAL
Published Feb 17, 20233y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Feb 17, 2023 3y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 2

VendorProductVersionRange
htacgtidy5.7.28any
linuxlinux_kernel*any

References 1

  • github.com https://github.com/htacg/tidy-html5/issues/946
    ExploitPatch

Remediation

  • github.com https://github.com/htacg/tidy-html5/issues/946
    ExploitPatch