CVE-2025-54321

Name: CVE-2025-54321
Creator: NVD / NIST
Published: 2025-11-18T19:15:49.043+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2025-54321 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the reset password function, leading to an email bombing vulnerability. An authenticated attacker can exploit this by automating reset password requests.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the reset password function, leading to an email bombing vulnerability. An authenticated attacker can exploit this by automating reset password requests.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.41%

32.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-799

Affected Software

Vendor	Product	Versions
Ascertia	Signinghub	<= 8.6.8

References

https://github.com/saykino/CVE-2025-54321Third Party Advisory
https://www.ascertia.com/company/vulnerability-disclosure-policy/Vendor Advisory

Timeline

Published: Nov 18, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-54321?

How severe is CVE-2025-54321?

CVE-2025-54321 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2025-54321?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-54321?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST