CVE-2025-56221CRITICAL 9.8EPSS p42.6%

CVE-2025-56221CVE-2025-56221

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.57% probability of exploitation · percentile 42.6% · 2026-06-18T12:00:27Z
Published2025-10-17
Last modified2025-10-27

Underlying weaknesses· 1

CWE-307

References

  1. https://github.com/saykino/CVE-2025-56221

1

TypeTargetConfidenceTier
WeaknessImproper Restriction of Excessive Authentication Attemptscwe-3070%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.