{"id":"CVE-2006-6421","url":"https://www.cyber-defence.io/tools/cve/CVE-2006-6421","generatedAt":"2026-10-27T17:42:57.820Z","title":"Cross-site scripting (XSS) vulnerability in the private message box implementation (privmsg.php) in phpBB 2.0.x allows remote authenticated users to inject arbitrary web script or HTML via the \"Message body\" field in a message to a non-existent user.","description":"Cross-site scripting (XSS) vulnerability in the private message box implementation (privmsg.php) in phpBB 2.0.x allows remote authenticated users to inject arbitrary web script or HTML via the \"Message body\" field in a message to a non-existent user.","published":"2006-12-10T11:28:00.000Z","lastModified":"2026-06-16T22:33:06.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":6,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:S/C:P/I:P/A:P"},"cwe":[],"affected":["phpbb group/phpbb"],"epss":{"score":0.15564,"percentile":0.96811,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2007-01-11","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":29442,"kind":"exploit","title":"phpBB 2.0.21 - 'privmsg.php' HTML Injection","url":"https://www.exploit-db.com/exploits/29442","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/29442.html","file":"exploits/php/webapps/29442.html","published":"2007-01-11","added":"2007-01-11","updated":"2013-11-05","author":"Demential","type":"webapps","platform":"php","port":null,"verified":true,"codes":["CVE-2006-6421","OSVDB-31859"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.securityfocus.com/bid/22001/info"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 15.6%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://secunia.com/advisories/23283","source":"cve@mitre.org"},{"url":"http://securityreason.com/securityalert/2005","source":"cve@mitre.org"},{"url":"http://www.phpbb.com/phpBB/viewtopic.php?f=14&t=489624","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/453774/100/0/threaded","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/456579/100/0/threaded","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/456728/100/100/threaded","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/456784/100/100/threaded","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/21806","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/22001","source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/30776","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/23283","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://securityreason.com/securityalert/2005","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.phpbb.com/phpBB/viewtopic.php?f=14&t=489624","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/453774/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/456579/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/456728/100/100/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/456784/100/100/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/21806","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/22001","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/30776","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2006-6421","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}