Vulnerability in Htacg Tidy
CVE-2025-6498
A vulnerability classified as problematic has been found in HTACG tidy-html5 5.8.0. Affected is the function defaultAlloc of the file src/alloc.c. The manipulation leads to memory leak. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (12.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Htacg Tidy — versions 5.8.0
- Htacg Tidy-Html5 — versions 5.8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/htacg/tidy-html5/issues/1152 (issue-tracking, Exploit, Issue Tracking)
- github.com/user-attachments/files/20438303/tidy-html5_crash_3.txt (Exploit, exploit)
Frequently asked questions
- What is CVE-2025-6498?
- CVE-2025-6498 is a low-severity vulnerability in Htacg Tidy, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 3.3/10. Published 2025-06-23.
- How severe is CVE-2025-6498?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2025-6498 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.