HTACG tidy-html5 5.8.0 src/parser.c prvTidyParseNamespace assertion
Summary
A vulnerability classified as problematic has been found in HTACG tidy-html5 5.8.0. This vulnerability affects the function prvTidyParseNamespace of the file src/parser.c. The manipulation leads to assertion.
This vulnerability is listed as CVE-2025-6497. The attack must be carried out locally. In addition, an exploit is available.
Details
A vulnerability was found in HTACG tidy-html5 5.8.0. It has been rated as problematic. This issue affects the function prvTidyParseNamespace of the file src/parser.c. The manipulation with an unknown input leads to a assertion vulnerability. Using CWE to declare the problem leads to CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. Impacted is availability.
The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-6497. The exploitation is known to be easy. An attack has to be approached locally. Technical details as well as a public exploit are known.
The exploit is available at github.com. It is declared as proof-of-concept.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-18860). If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Product
Vendor
Name
Version
Website
- Product: https://github.com/htacg/tidy-html5/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 3.3VulDB Meta Temp Score: 3.1
VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍
CNA Base Score: 3.3
CNA Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: AssertionCWE: CWE-617
CAPEC: 🔒
ATT&CK: 🔒
Physical: Partially
Local: Yes
Remote: No
Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
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| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
06/22/2025 Advisory disclosed06/22/2025 VulDB entry created
06/23/2025 VulDB entry last update
Sources
Product: github.comAdvisory: 1142
Status: Not defined
CVE: CVE-2025-6497 (🔒)
GCVE (CVE): GCVE-0-2025-6497
GCVE (VulDB): GCVE-100-313613
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 06/22/2025 21:09Updated: 06/23/2025 04:08
Changes: 06/22/2025 21:09 (56), 06/23/2025 03:22 (30), 06/23/2025 04:08 (1)
Complete: 🔍
Submitter: JJLeo
Cache ID: 216::103
Submit
Accepted
- Submit #601008: htacg tidy-html5 tidy-html5 5.8.0 (commit d08ddc2) Reachable Assertion (by JJLeo)
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
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