Email Bombing Vulnerability in Ascertia SigningHub Software
CVE-2025-54321

9.8CRITICAL

Key Information:

Vendor

Ascertia

Status
SigningHub
Vendor
CVE Published:
18 November 2025

What is CVE-2025-54321?

In Ascertia SigningHub versions up to and including 8.6.8, the absence of adequate rate limiting on the password reset function exposes users to an email bombing risk. An authenticated attacker can exploit this flaw by sending a barrage of automated password reset requests, overwhelming users' inboxes and potentially disrupting service. Organizations using SigningHub should take immediate steps to implement rate limiting and monitor for unusual activity to mitigate this vulnerability.

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References

https://www.ascertia.com/company/vulnerability-disclosure...
https://github.com/saykino/CVE-2025-54321

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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