How severe is CVE-2025-56218?

CVE-2025-56218 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-56218 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-56218?

CVE-2025-56218 affects Ascertia Signinghub. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56218?

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

Does CVE-2025-56218 have an EU (EUVD) identifier?

Yes. CVE-2025-56218 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34911.

When was CVE-2025-56218 published?

CVE-2025-56218 was published on 2025-10-17 and last updated on 2026-07-05.

CVE-2025-56218

CVE-2025-56218 is a critical-severity vulnerability in Ascertia Signinghub with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34911
Weakness: CWE-434
Affected product: Ascertia Signinghub
Published: 2025-10-17
Last modified: 2026-07-05

Description

An arbitrary file upload vulnerability in SigningHub v8.6.8 allows attackers to execute arbitrary code via uploading a crafted PDF file.

Frequently asked questions

What is CVE-2025-56218?: An arbitrary file upload vulnerability in SigningHub v8.6.8 allows attackers to execute arbitrary code via uploading a crafted PDF file.
How severe is CVE-2025-56218?: CVE-2025-56218 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-56218 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-56218?: CVE-2025-56218 affects Ascertia Signinghub. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56218?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-56218 have an EU (EUVD) identifier?: Yes. CVE-2025-56218 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34911.
When was CVE-2025-56218 published?: CVE-2025-56218 was published on 2025-10-17 and last updated on 2026-07-05.

References

https://github.com/saykino/CVE-2025-56218

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-2025-56224 — 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-2025-56223 — High (CVSS 7.5): A lack of rate limiting in the component /Home/UploadStreamDocument of SigningHub v8.6.8 allows attackers to cause a…
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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