MEDIUM
CVE-2025-6498
CWE-401Published: June 23, 2025· Updated: Jun 17, 2026
5.5
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2025-6498 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
htacg1 product(s)
tidy
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
ADVISORYhttps://vuldb.com/?id.313614
ADVISORYhttps://vuldb.com/?submit.601009
All References (6)
→
https://github.com/htacg/tidy-html5/issues/1152Exploit · Issue Tracking
→
https://vuldb.com/?ctiid.313614Permissions Required · VDB Entry
→
https://vuldb.com/?id.313614Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.601009Third Party Advisory · VDB Entry
→
https://github.com/htacg/tidy-html5/issues/1152Exploit · Issue Tracking
Quick Facts
CVE IDCVE-2025-6498
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-401
CISA KEVNo
Affected1 vendor(s)
PublishedJun 23, 2025
Related CVEs (CWE-401)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-6498 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.