CVE-2025-56223 PoC — SigningHub 安全漏洞

Source

https://github.com/saykino/CVE-2025-56223

Associated Vulnerability

Title: SigningHub 安全漏洞 (CVE-2025-56223)
Description:A lack of rate limiting in the component /Home/UploadStreamDocument of SigningHub v8.6.8 allows attackers to cause a Denial of Service (DoS) via uploading an excessive number of files.

Readme

# CVE-2025-56223 Denial of Service – Upload Document API 

Description

An attacker can rapidly upload a large volume of files to cause denial of service.

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CVSS Score: 7.1 (High)

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 Attack Type

 * Remote (Authenticated)
   
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 Affected Versions

* Versions before <= 8.6.8

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 Vendor of Product

*  Ascertia

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  Affected Product Code Base
  
* SigningHub

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  Affected Component
  
* Upload Document API (/Home/UploadStreamDocument).

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 Mitigations

* Implement rate-limit for the Upload Document API.
  
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Vulnerability Details

* The file upload functionality does not enforce any rate limiting or throttling, allowing users to upload files at an unrestricted rate. An attacker can exploit this behavior to rapidly upload a large volume of files, potentially leading to resource exhaustion such as disk space depletion, increased server load, or degraded performance.

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 Fixed versions
 *  Versions after > 8.6.8 
 
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 Discovered By:
 * Yazan Abu-Nadi

File Snapshot

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