alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Stored XSS Vulnerability CVE-2021-31250 M4"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/man.cgi?redirect=setting.htm"; content:"TF_port=|2f 22 3e 3c|img|20|src|3d 22 23 22 3e|"; fast_pattern; reference:cve,2021-31250; reference:url,packetstormsecurity.com/files/162887/CHIYU-IoT-Cross-Site-Scripting.html; classtype:web-application-attack; sid:2033352; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_07_16, cve CVE_2021_31250, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_16;)