What is CVE-2025-63651?

CVE-2025-63651 is a high-severity vulnerability in Monkey-Project Monkey, classified under Use After Free. CVSS score: 7.5/10. Published 2026-01-29.

How severe is CVE-2025-63651?

High severity. CVSS v3 base score is 7.5 out of 10.

Use After Free in Monkey-Project Monkey

CVE-2025-63651

A use-after-free in the mk_string_char_search function (mk_core/mk_string.c) of monkey commit f37e984 allows attackers to cause a Denial of Service (DoS) via sending a crafted HTTP request to the server.

Vulnerability class: Use-After-Free

EPSS: 0.009 (56.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Monkey-project Monkey
N/a — versions n/a

Weakness classification (CWE)

CWE-416 — Use After Free

References

cve@mitre.org (Exploit, Issue Tracking)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-63651?: CVE-2025-63651 is a high-severity vulnerability in Monkey-Project Monkey, classified under Use After Free. CVSS score: 7.5/10. Published 2026-01-29.
How severe is CVE-2025-63651?: High severity. CVSS v3 base score is 7.5 out of 10.