ET WEB_SPECIFIC_APPS W3 Total Cache admin-post.php browsercache__security__xfo__allow Parameter Remote Code Execution Attempt (CVE-2026-57623)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS W3 Total Cache admin-post.php browsercache__security__xfo__allow Parameter Remote Code Execution Attempt (CVE-2026-57623)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/wp-admin/admin-post.php";
    http.request_body;
    content:"action|3d|w3tc_save_options"; fast_pattern;
    content:"w3tc_save_options_nonce|3d|";
    content:"browsercache__security__xfo__allow|3d|";
    content:"sameorigin"; nocase; within:15;
    content:"rewriteengine"; nocase; within:20;
    content:"rewriterule"; nocase; within:20;
    content:"browsercache__security__xfo__enabled|3d|1";
    reference:url,atomicedge.io/cve-proof/cve-2026-57623-w3-total-cache-version-2-9-4-high-vulnerability-proof-of-concept/;
    reference:cve,2026-57623;
    classtype:attempted-admin;
    sid:2071363; rev:1;
    metadata:affected_product Wordpress_Plugins, attack_target Web_Server, tls_state plaintext, created_at 2026_08_03, cve CVE_2026_57623, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2026_08_03, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)