What is CVE-2025-63721?

CVE-2025-63721 is a high-severity vulnerability in Hummerrisk, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2025-12-08.

How severe is CVE-2025-63721?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Hummerrisk

CVE-2025-63721

HummerRisk thru v1.5.0 is using a vulnerable Snakeyaml component, allowing attackers with normal user privileges to hit the /rule/add API and thereby achieve RCE and take over the server.

Vulnerability class: Insecure Deserialization

EPSS: 0.004 (33.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Hummerrisk
N/a — versions n/a

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

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

Frequently asked questions

What is CVE-2025-63721?: CVE-2025-63721 is a high-severity vulnerability in Hummerrisk, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2025-12-08.
How severe is CVE-2025-63721?: High severity. CVSS v3 base score is 8.8 out of 10.