alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Jitsi Meet Plugin XSS Attempt (CVE-2021-26812)"; flow:established,to_server; http.uri; content:"/mod/jitsi/sessionpriv.php?avatar="; nocase; content:"&nom="; nocase; reference:cve,2021-26812; reference:url,vuldb.com/?id.173035; classtype:attempted-user; sid:2033602; rev:1; metadata:attack_target Server, created_at 2021_07_28, cve CVE_2021_26812, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2021_07_28, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)