ET EXPLOIT Online Scheduling System 1.0 - Authentication Bypass Attempt

alert http $EXTERNAL_NET any -> any any (
    msg:"ET EXPLOIT Online Scheduling System 1.0 - Authentication Bypass Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/Online%20Scheduling%20System/login.php"; fast_pattern;
    http.request_body;
    content:"username="; depth:9; nocase;
    content:"&password="; nocase; distance:0;
    content:"&lgn=Login"; nocase; endswith;
    reference:url,www.exploit-db.com/exploits/48409;
    classtype:attempted-admin;
    sid:2030094; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2020_05_04, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_24, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)