What is CVE-2025-56224?

CVE-2025-56224 is a high-severity vulnerability in Ascertia Signinghub, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 8.1/10. Published 2025-10-20.

How severe is CVE-2025-56224?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2025-56224 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Ascertia Signinghub

CVE-2025-56224

A lack of rate limiting in the One-Time Password (OTP) verification endpoint of SigningHub v8.6.8 allows attackers to bypass verification via a bruteforce attack.

EPSS: 0.005 (36.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ascertia Signinghub
N/a — versions n/a

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

Public proof-of-concept exploits

References

cve@mitre.org (Product)
cve@mitre.org (Product)
cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2025-56224?: CVE-2025-56224 is a high-severity vulnerability in Ascertia Signinghub, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 8.1/10. Published 2025-10-20.
How severe is CVE-2025-56224?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2025-56224 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.