Vulnerability in Ascertia Signinghub
CVE-2025-54321
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (38.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.ascertia.com/company/vulnerability-disclosure-policy/ (Vendor Advisory)
- github.com/saykino/CVE-2025-54321 (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-54321?
- CVE-2025-54321 is a critical-severity vulnerability in Ascertia Signinghub, classified under CWE-799. CVSS score: 9.8/10. Published 2025-11-18.
- How severe is CVE-2025-54321?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-54321 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.