WordPress Download Manager Free 2.7.94 & Pro 4 Authenticated Stored XSS

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WordPress Download Manager Free 2.7.94 & Pro 4 Authenticated Stored XSS


Code:
# WordPress Download Manager Free 2.7.94 & Pro 4 Authenticated Stored XSS

# Vendor Homepage: http://www.wpdownloadmanager.com
# Software Link: https://wordpress.org/plugins/download-manager
# Affected Versions: Free 2.7.94 & Pro 4
# Tested on: WordPress 4.2.2

# Discovered by Filippos Mastrogiannis
# Twitter: @filipposmastro
# LinkedIn: https://www.linkedin.com/pub/filippos-mastrogiannis/68/132/177

-- Description --

This stored XSS vulnerability allows any authenticated wordpress user
to inject malicious code via the name of the uploaded file:
e.g. <svg onload=3D3Dalert(0)>.jpg

The vulnerability exists because the file name is not properly sanitized
and this can lead to malicious code injection that will be executed on the
target=3DE2=3D80=3D99s browser

-- Proof of Concept --

1. The attacker creates a new download package via the plugin's menu
and uploads a file with the name: <svg onload=3D3Dalert(0)>.jpg

2. The stored XSS can be triggered when an authenticated user (e.g. admin)
attempts to edit this download package

-- Solution --

Upgrade to the latest version