What is CVE-2025-56223?

CVE-2025-56223 is a high-severity vulnerability in Ascertia Signinghub, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-10-20.

How severe is CVE-2025-56223?

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

Is CVE-2025-56223 known to be exploited?

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

Resource exhaustion in Ascertia Signinghub

CVE-2025-56223

A lack of rate limiting in the component /Home/UploadStreamDocument of SigningHub v8.6.8 allows attackers to cause a Denial of Service (DoS) via uploading an excessive number of files.

EPSS: 0.005 (41.2th 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

Ascertia Signinghub
N/a — versions n/a

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

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-2025-56223?: CVE-2025-56223 is a high-severity vulnerability in Ascertia Signinghub, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-10-20.
How severe is CVE-2025-56223?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-56223 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.