What is CVE-2025-65951?

CVE-2025-65951 is a high-severity vulnerability in Mescuwa Entropy-Derby, classified under Information Disclosure. CVSS score: 8.7/10. Published 2025-11-25.

How severe is CVE-2025-65951?

High severity. CVSS v3 base score is 8.7 out of 10.

Information disclosure in Mescuwa Entropy-Derby

CVE-2025-65951

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.

Vulnerability class: Information Disclosure

EPSS: 0.001 (1.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N.

Affected products

Mescuwa Entropy-derby — versions < 2d38d2f16bbb3b4240698148f80d8c5202725c77

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-65951?: CVE-2025-65951 is a high-severity vulnerability in Mescuwa Entropy-Derby, classified under Information Disclosure. CVSS score: 8.7/10. Published 2025-11-25.
How severe is CVE-2025-65951?: High severity. CVSS v3 base score is 8.7 out of 10.