alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET WEB_SPECIFIC_APPS WEB-PHP RCE PHPBB 2004-1315"; flow:established,to_server; http.uri; content:"viewtopic.php"; nocase; content:"highlight="; nocase; http.uri.raw; pcre:"/[&?]highlight=[^&]*?\x2525[a-f0-9]{2}/i"; reference:cve,2004-1315; classtype:web-application-attack; sid:2021390; rev:3; metadata:created_at 2015_07_07, cve CVE_2004_1315, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_28;)