CVE-2025-56221 Auth bypass in n/a
Attackers can bypass authentication via brute force due to missing rate limiting in the login mechanism.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-56221?
CVE-2025-56221 is a critical authentication bypass vulnerability in n/a, published on 17 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A lack of rate limiting in the login mechanism of SigningHub v8.6.8 allows attackers to bypass authentication via a brute force attack.
Weakness: CWE-307
Which versions are affected by CVE-2025-56221?
It affects 1 product.
Products include Ascertia Signinghub.
How do I fix CVE-2025-56221?
No fix has been published for CVE-2025-56221 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-56221 being exploited?
There is no known exploitation of CVE-2025-56221 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as GHSA-w54h-jpcf-gvh9.