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THREATINT
PUBLISHED

CVE-2025-6496

HTACG tidy-html5 parser.c InsertNodeAsParent null pointer dereference



Description

EN DE

A vulnerability was found in HTACG tidy-html5 5.8.0. It has been declared as problematic. This vulnerability affects the function InsertNodeAsParent of the file src/parser.c. The manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used.

In HTACG tidy-html5 5.8.0 wurde eine Schwachstelle ausgemacht. Sie wurde als problematisch eingestuft. Betroffen ist die Funktion InsertNodeAsParent der Datei src/parser.c. Mit der Manipulation mit unbekannten Daten kann eine null pointer dereference-Schwachstelle ausgenutzt werden. Die Umsetzung des Angriffs hat dabei lokal zu erfolgen. Der Exploit steht zur öffentlichen Verfügung.

Reserved 2025-06-22 | Published 2025-06-23 | Updated 2025-06-23 | Assigner VulDB


MEDIUM: 4.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
LOW: 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
LOW: 3.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
1.7AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

NULL Pointer Dereference

Denial of Service

Product status

5.8.0
affected

Timeline

2025-06-22:Advisory disclosed
2025-06-22:VulDB entry created
2025-06-22:VulDB entry last update

Credits

JJLeo (VulDB User) reporter

References

vuldb.com/?id.313612 (VDB-313612 | HTACG tidy-html5 parser.c InsertNodeAsParent null pointer dereference) vdb-entry technical-description

vuldb.com/?ctiid.313612 (VDB-313612 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.601007 (Submit #601007 | htacg tidy-html5 tidy-html5 5.8.0 (commit d08ddc2) NULL Pointer Dereference) third-party-advisory

github.com/htacg/tidy-html5/issues/1141 issue-tracking

github.com/...ttachments/files/19652942/tidy-html5_crash.txt exploit

cve.org (CVE-2025-6496)

nvd.nist.gov (CVE-2025-6496)

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