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WordPress Plugin Videos sync PDF 1.7.4 - Stored Cross Site Scripting (XSS)



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# Exploit Title: WordPress Plugin Videos sync PDF 1.7.4 - Stored Cross Site Scripting (XSS)
# Google Dork: inurl:/wp-content/plugins/video-synchro-pdf/
# Date: 2022-04-13
# Exploit Author: UnD3sc0n0c1d0
# Vendor Homepage: http://www.a-j-evolution.com/
# Software Link: https://downloads.wordpress.org/plugin/video-synchro-pdf.1.7.4.zip
# Category: Web Application
# Version: 1.7.4
# Tested on: CentOS / WordPress 5.9.3
# CVE : N/A

# 1. Technical Description:
The plugin does not properly sanitize the nom, pdf, mp4, webm and ogg parameters, allowing 
potentially dangerous characters to be inserted. This includes the reported payload, which 
triggers a persistent Cross-Site Scripting (XSS).
# 2. Proof of Concept (PoC):
 a. Install and activate version 1.7.4 of the plugin.
 b. Go to the plugin options panel (http://[TARGET]/wp-admin/admin.php?page=aje_videosyncropdf_videos).
 c. Open the "Video example" or create a new one (whichever you prefer).
 d. Change or add in some of the displayed fields (Name, PDF file, MP4 video, WebM video or OGG video) 
	the following payload:
		" autofocus onfocus=alert(/XSS/)>.
 e. Save the changes. "Edit" button.
 f. JavaScript will be executed and a popup with the text "XSS" will be displayed.

Note: This change will be permanent until you modify the edited field.
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