# CVE-2025-54320: In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the invite user function, leading to an…

Source: https://junglewise.ai/threats/cve-2025-54320-in-ascertia-signinghub-through-8-6-8-there-is-a-lack-of-rate  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-18  
License: CC BY 4.0 with a link back

CVE-2025-54320 · Severity: medium · CVSS 4.3 · Published 2025-11-18

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.

Technologies: [Ascertia Signinghub](https://junglewise.ai/threats/technologies/signinghub). Vendors: [Ascertia](https://junglewise.ai/threats/vendors/ascertia).

## Quick answers

**Is CVE-2025-54320 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-54320 being exploited in the wild.

**How severe is CVE-2025-54320?** Medium severity, with a CVSS score of 4.3, published 18 November 2025.

**Which products and versions are affected?** Ascertia Signinghub. The advisory does not name versions.

**Is there a fix for CVE-2025-54320?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-54320?** Check whether you run Ascertia Signinghub. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Ascertia Signinghub

## Related threats

- [An open redirect in Ascertia SigningHub User v10.0 allows attackers to redirect users to a malicious site via a crafted URL.](https://junglewise.ai/threats/cve-2025-61166-an-open-redirect-in-ascertia-signinghub-user-v10-0-allows)
- [In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the reset password function, leading to an…](https://junglewise.ai/threats/cve-2025-54321-in-ascertia-signinghub-through-8-6-8-there-is-a-lack-of-rate)
- [Ascertia SigningHub OTP verification bypass via brute force](https://junglewise.ai/threats/cve-2025-56224-ascertia-signinghub-otp-verification-bypass-via-brute-force)
- [Ascertia SigningHub denial of service in UploadStreamDocument](https://junglewise.ai/threats/cve-2025-56223-ascertia-signinghub-denial-of-service-in-uploadstreamdocument)
- [Ascertia SigningHub improper access control in Add User API](https://junglewise.ai/threats/cve-2025-56219-ascertia-signinghub-improper-access-control-in-add-user-api)