CVE-2023-43346: GitHub - sromanhu/CVE-2023-43346-Quick-CMS-Stored-XSS---Languages-Backend: Quick CMS 6.7 is affected by a Cross-Site Scripting (XSS) vulnerability that allows attackers to execute arbitrary code via a

Quick CMS Stored XSS v6.7****Author: (Sergio)

Description: A Cross-Site Scripting (XSS) vulnerability in Quick CMS v6.7 allows a local attacker to execute arbitrary code via a crafted script to the to the Backend - Dashboard in the Languages Menu.

Attack Vectors: Scripting A vulnerability in the sanitization of the entry in the Backend of “Languages- Backend” allows injecting JavaScript code that will be executed when the user accesses the web page.

POC:

When logging into the panel, we will go to the “Languages - Backend .” section off General Menu.

We edit that Backend Settings and see that we can inject arbitrary Javascript code in the Dashboard field.

XSS Payload:

'"><svg/onload=alert(‘Dashboard’)>

In the following image you can see the embedded code that executes the payload in the main web.

Additional Information:

https://opensolution.org/cms-system-quick-cms.html

https://owasp.org/Top10/es/A03_2021-Injection/