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Vulnerabilities

Security research · CVE-2025-65951

Inside Track / Entropy Derby is a research-grade horse-racing betting engine.

Published Nov 25, 2025 · catalog updated Nov 25, 2025 · Inside Track / Entropy

Last checked Oct 28, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-65951. EPSS is 0.13%. Act only if a listed version of Inside Track / Entropy is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Inside Track / Entropy).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.13%
Remediation
Version ranges on file
Affected products
vendor mescuwa entropy-derby < 2d38d2f16bbb3b4240698148f80d8c5202725c77

Inside Track / Entropy Derby is a research-grade horse-racing betting engine. Prior to commit 2d38d2f, the VDF-based timelock encryption system fails to enforce sequential delay against the betting operator. Bettors pre-compute the entire Wesolowski VDF and include vdfOutputHex in their encrypted bet ticket, allowing the house to decrypt immediately using fast proof verification instead of expensive VDF evaluation. This issue has been patched via commit 2d38d2f.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor mescuwa entropy-derby < 2d38d2f16bbb3b4240698148f80d8c5202725c77< 2d38d2f16bbb3b4240698148f80d8c5202725c77

How to fix CVE-2025-65951

  • Upgrade

    CVE-2025-65951 lists a fix boundary at 2d38d2f16bbb3b4240698148f80d8c5202725c77. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 2d38d2f16bbb3b4240698148f80d8c5202725c77

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-65951. EPSS is 0.13%. Act only if a listed version of Inside Track / Entropy is installed.

Which versions are affected?

Compare what you have installed with mescuwa entropy-derby < 2d38d2f16bbb3b4240698148f80d8c5202725c77 < 2d38d2f16bbb3b4240698148f80d8c5202725c77. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.13%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 25, 2025 · EUVD

    Detected

    Inside Track / Entropy Derby is a research-grade horse-racing betting engine. Prior to commit 2d38d2f, the VDF-based timelock encryption system fails to enforce sequential delay against the betting operator. Bettors pre-compute the entire Wesolowski VDF and include vdfOutputHex in their encrypted bet ticket, allowing the house to decrypt immediately using fast proof verification instead of expensi

  2. Nov 25, 2025 · EUVD

    Updated

    Inside Track / Entropy Derby is a research-grade horse-racing betting engine. Prior to commit 2d38d2f, the VDF-based timelock encryption system fails to enforce sequential delay against the betting operator. Bettors pre-compute the entire Wesolowski VDF and include vdfOutputHex in their encrypted bet ticket, allowing the house to decrypt immediately using fast proof verification instead of expensi

Sources

  • CVE.orgVulnerability recordCVE-2025-65951

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-65951

    30-day exploitation probability 0.13%

    first.org
  • EUVDVulnerability recordEUVD-2025-199528

    Inside Track / Entropy Derby is a research-grade horse-racing betting engine. Prior to commit 2d38d2f, the VDF-based timelock encryption system fails to enforce sequential delay against the betting operator. Bettors pre-compute the entire Wesolowski VDF and include vdfOutputHex i

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 28, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 28, 2026
  • CVE.orgOct 28, 2026
  • EUVDOct 28, 2026