ET WEB_SPECIFIC_APPS Kentico Xperience CMS Authentication Bypass Attempt (CVE-2025-2746)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Kentico Xperience CMS Authentication Bypass Attempt (CVE-2025-2746)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:33;
    content:"/CMSPages/Staging/SyncServer.asmx"; fast_pattern;
    http.header;
    content:"SOAPAction|3a 20 22 3c|http|3a 2f 2f|localhost|2f|SyncWebService|2f|SyncServer|2f|ProcessSynchronizationTaskData|3e 22|";
    http.request_body;
    content:"|3c|soap|3a|Header|3e|";
    content:"|3c|wsse|3a|UsernameToken|3e|"; within:300;
    content:"|3c|wsse|3a|Username|3e|"; within:30;
    content:"|3c|wsse|3a|Password|20|Type|3d 22 3c|http|3a|//docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0|23|PasswordDigest|3e 22|"; within:200;
    content:"|3c|wsse|3a|Nonce|3e|"; within:80;
    content:"|3c|wsu|3a|Created|3e|"; within:80;
    content:"|3c|ProcessSynchronizationTaskData|20|xmlns|3d 22 3c|http|3a 2f 2f|localhost|2f|SyncWebService|2f|SyncServer|3e 22|"; within:300;
    reference:cve,2025-2746;
    reference:url,labs.watchtowr.com/bypassing-authentication-like-its-the-90s-pre-auth-rce-chain-s-in-kentico-xperience-cms/;
    classtype:attempted-admin;
    sid:2061280; rev:1;
    metadata:affected_product Kentico_Xperience_CMS, attack_target Web_Server, tls_state plaintext, created_at 2025_04_03, cve CVE_2025_2746, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_04_03, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)