CVE-2025-54320: signinghub DoS — Fix

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.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-770 CWE-770

Affected Products

Vendor	Product	Versions
ascertia	signinghub	< 8.6.8

References

Advisories & Patches

https://www.ascertia.com/company/vulnerability-disclosure-policy/

Other References

https://github.com/saykino/CVE-2025-54320

Frequently Asked Questions

What is 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 email bombing vulnerability. An authenticated attacker can exploit this by automating invite requests. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-54320? +

CVE-2025-54320 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-54320? +

CVE-2025-54320 affects products from ascertia, specifically: signinghub. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-54320? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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