CVE-2025-6497

LOWPre-NVD 3.33.3—
EchelonGraph scoreMEDIUM confidence

Score 3.3 from GitHub Security Advisory published 2025-06-23. a secondary CVSS source baseline 3.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
3.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 3.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 leads to reachable assertion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.

CVSS v3
3.3
EG Score
3.3(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity33% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
3.6%
KEV
Not listed

Published

June 23, 2025

Last Modified

June 17, 2026

References (5)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 116 total refreshes for this CVE.

  1. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:01 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
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  23. 2026-07-10 10:52 UTCOSV refresh
  24. 2026-07-09 19:10 UTCEPSS rescore
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  1. 2026-07-07 13:46 UTCEPSS rescore
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  21. 2026-06-24 14:04 UTCEPSS rescore
  22. 2026-06-24 09:51 UTCNVD updateCVSS v4 → 1.9
  23. 2026-06-23 21:32 UTCEPSS rescore
  24. 2026-06-22 14:25 UTCEPSS rescore
  25. 2026-06-22 14:25 UTCEPSS rescore
  26. 2026-06-21 20:42 UTCOSV refresh
  27. 2026-06-21 14:56 UTCEPSS rescore
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  29. 2026-06-21 01:59 UTCEPSS rescore
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  31. 2026-06-19 19:25 UTCEPSS rescore
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  44. 2026-06-08 14:17 UTCEPSS rescore
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  46. 2026-06-07 15:24 UTCEPSS rescore
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  48. 2026-06-06 13:47 UTCEPSS rescore
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  50. 2026-06-05 22:47 UTCEPSS rescore
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  54. 2026-06-04 13:12 UTCEPSS rescore
  55. 2026-06-04 13:12 UTCEPSS rescore
  56. 2026-06-03 03:10 UTCOSV refresh
  57. 2026-06-02 20:13 UTCEPSS rescore
  58. 2026-06-01 13:51 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2025-6497?
CVE-2025-6497 is a low vulnerability published on June 23, 2025. 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 leads to reachable assertion. Attacking locally is a requirement. The exploit has been disclosed to the public and…
When was CVE-2025-6497 disclosed?
CVE-2025-6497 was first published in the National Vulnerability Database on June 23, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-6497 actively exploited?
CVE-2025-6497 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-6497?
CVE-2025-6497 has a CVSS v3 base score of 3.3 (NVD).
How do I remediate CVE-2025-6497?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-6497, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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