ET WEB_SPECIFIC_APPS Zoho ManageEngine ServiceDesk Plus Unauthenticated Stored XSS (CVE-2021-20080)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Zoho ManageEngine ServiceDesk Plus Unauthenticated Stored XSS (CVE-2021-20080)";
    flow:established,to_server;
    http.uri;
    content:"/discoveryServlet/WsDiscoveryServlet|3f|"; fast_pattern;
    http.request_body;
    content:"inet|20|";
    pcre:"/^[^\x0d\x0a]*?\x3b\x7d\x7b/R";
    reference:url,www.tenable.com/security/research/tra-2021-11;
    reference:cve,2021-20080;
    classtype:web-application-attack;
    sid:2066203; rev:1;
    metadata:affected_product Zoho_ManageEngine, attack_target Server, tls_state TLSDecrypt, created_at 2025_12_09, cve CVE_2021_20080, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2025_12_09, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)