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CVE-2025-56221

CriticalCVSS 9.8/10Last modified Nov 5, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/saykino/CVE-2025-56221Third Party Advisory

Timeline

Published: Oct 17, 2025
Last modified: Nov 5, 2026
NVD status: Analyzed

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CVE-2025-56221: Critical severity, CVSS 9.8 | Vulnix