Piwigo v13.7.0 - Stored Cross-Site Scripting (XSS) (Authenticated)

#Exploit Title: Piwigo v13.7.0 - Stored Cross-Site Scripting (XSS) (Authenticated)
#Date: 25 June 2023
#Exploit Author: Okan Kurtulus
#Vendor Homepage: https://piwigo.org
#Version: 13.7.0
#Tested on: Ubuntu 22.04
#CVE : N/A

# Proof of Concept:
1– Install the system through the website and log in with any user authorized to upload photos.
2–  Click "Add" under "Photos" from the left menu. The photo you want to upload is selected and uploaded.
3– Click on the uploaded photo and the photo editing screen opens. XSS payload is entered in the "Description" section on this screen. After saving the file, go to the homepage and open the page with the photo. The XSS payload appears to be triggered.

#Payload
<sCriPt>alert(1);</sCriPt>