ET WEB_SPECIFIC_APPS W3 Total Cache admin-post.php browsercache__security__xfo__allow Parameter Remote Code Execution Attempt (CVE-2026-57623)
Sourceet/open
Fileemerging-web_specific_apps.rules
CreatedAugust 3, 2026
UpdatedAugust 3, 2026
Classificationattempted-admin
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;)
References
Metadata
affected productWordpress_Plugins
attack targetWeb_Server
tls stateplaintext
created at2026_08_03
deploymentInternal
performance impactLow
confidenceHigh
signature severityMajor
tagExploit
updated at2026_08_03
mitre tactic idTA0001
mitre tactic nameInitial_Access
mitre technique idT1190
mitre technique nameExploit_Public_Facing_Application
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