Null Pointer Dereference Vulnerability in HTACG Tidy-HTML5 5.8.0
CVE-2025-6496

4.8MEDIUM

Key Information:

Vendor

Htacg

Status
Tidy-html5
Vendor
CVE Published:
23 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6496?

A vulnerability has been identified in Tidy-HTML5 version 5.8.0, specifically within the InsertNodeAsParent function located in src/parser.c. This flaw allows for a null pointer dereference, which could potentially lead to unexpected behavior or application crashes. Attackers with local access could exploit this vulnerability, emphasizing the necessity of safeguarding local systems against potential breaches.

Affected Version(s)

tidy-html5 5.8.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-6496 - Proof of Concept

References

https://vuldb.com/?id.313612
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313612
signaturepermissions-required
https://vuldb.com/?submit.601007
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

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