ET WEB_SERVER Next.js Middleware Authorization Bypass (CVE-2025-29927)

Query · suricata

flow:established,to_server;
http.header;
content:"x-middleware-subrequest|3a 20|"; nocase;
target:dest_ip;
Raw source ET WEB_SERVER Next.js Middleware Authorization Bypass (CVE-2025-29927) · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_SERVER Next.js Middleware Authorization Bypass (CVE-2025-29927)";
    flow:established,to_server;
    http.header;
    content:"x-middleware-subrequest|3a 20|"; nocase;
    reference:url,projectdiscovery.io/blog/nextjs-middleware-authorization-bypass;
    reference:cve,2025-29927;
    classtype:web-application-attack;
    sid:2061026; rev:1;
    metadata:attack_target Server, created_at 2025_03_24, cve CVE_2025_29927, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2025_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;
)

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