---
id: CVE-2025-56224
title: >-
  A lack of rate limiting in the One-Time Password (OTP) verification endpoint
  of SigningHub v8.6.8 allows attackers to bypass verification via a bruteforce
  attack.
summary: >-
  A lack of rate limiting in the One-Time Password (OTP) verification endpoint
  of SigningHub v8.6.8 allows attackers to bypass verification via a bruteforce
  attack.
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-307
vendor: ascertia
product: signinghub
affected:
  - signinghub <= 8.6.8
published: '2025-10-20'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-56224'
references:
  - url: 'https://github.com/saykino/CVE-2025-56224'
    label: cve@mitre.org
tags:
  - nvd
  - exploit-available
epss: 0.00389
epssPercentile: 0.30271
ingestedAt: '2026-07-06T16:44:34.303Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/saykino/CVE-2025-56224'
  checkedAt: '2026-09-26T09:05:34.078Z'
exploitAvailable: true
---

## Overview

A lack of rate limiting in the One-Time Password (OTP) verification endpoint of SigningHub v8.6.8 allows attackers to bypass verification via a bruteforce attack.

## Affected

- `signinghub <= 8.6.8`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.