How severe is CVE-2025-56223?

CVE-2025-56223 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-56223 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-56223?

CVE-2025-56223 affects Ascertia Signinghub. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56223?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-56223 have an EU (EUVD) identifier?

Yes. CVE-2025-56223 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35048.

When was CVE-2025-56223 published?

CVE-2025-56223 was published on 2025-10-20 and last updated on 2026-07-05.

CVE-2025-56223

CVE-2025-56223 is a high-severity vulnerability in Ascertia Signinghub with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35048
Weakness: CWE-770
Affected product: Ascertia Signinghub
Published: 2025-10-20
Last modified: 2026-07-05

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-56223?: CVE-2025-56223 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-56223 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-56223?: CVE-2025-56223 affects Ascertia Signinghub. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56223?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-56223 have an EU (EUVD) identifier?: Yes. CVE-2025-56223 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35048.
When was CVE-2025-56223 published?: CVE-2025-56223 was published on 2025-10-20 and last updated on 2026-07-05.

References

https://github.com/saykino/CVE-2025-56223

EU advisories (EUVD)

Affected products (1)

cpe:2.3:a:ascertia:signinghub:*:*:*:*:*:*:*:*

More vulnerabilities in Ascertia Signinghub

CVE-2025-54321 — Critical (CVSS 9.8): In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the reset password function, leading to an…
CVE-2025-56221 — Critical (CVSS 9.8): A lack of rate limiting in the login mechanism of SigningHub v8.6.8 allows attackers to bypass authentication via a…
CVE-2025-56218 — Critical (CVSS 9.8): An arbitrary file upload vulnerability in SigningHub v8.6.8 allows attackers to execute arbitrary code via uploading a…
CVE-2025-56224 — High (CVSS 8.1): A lack of rate limiting in the One-Time Password (OTP) verification endpoint of SigningHub v8.6.8 allows attackers to…
CVE-2025-56219 — High (CVSS 7.1): Incorrect access control in SigningHub v8.6.8 allows attackers to arbitrarily add user accounts without any rate…
CVE-2025-61166 — Medium (CVSS 6.1): An open redirect in Ascertia SigningHub User v10.0 allows attackers to redirect users to a malicious site via a crafted…

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