CVE-2025-54320 Denial of service in n/a
An authenticated attacker can cause email bombing by automating invite requests due to missing rate limiting in Ascertia SigningHub.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-54320?
CVE-2025-54320 is a medium-severity denial of service vulnerability in n/a, published on 18 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the invite user function, leading to an email bombing vulnerability. An authenticated attacker can exploit this by automating invite requests.
Weakness: CWE-770
Which versions are affected by CVE-2025-54320?
It affects 1 product.
Products include Ascertia Signinghub.
How do I fix CVE-2025-54320?
No fix has been published for CVE-2025-54320 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-54320 being exploited?
There is no known exploitation of CVE-2025-54320 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-6w7j-h94f-mm6r.