{"id":"CVE-2016-8869","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-8869","generatedAt":"2026-10-28T19:47:00.945Z","title":"The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4 allows remote attackers to gain privileges by leveraging incorrect use of unfiltered data when registering on a site.","description":"The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4 allows remote attackers to gain privileges by leveraging incorrect use of unfiltered data when registering on a site.","published":"2016-11-04T21:59:08.000Z","lastModified":"2026-06-17T00:55:07.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-20"],"affected":["joomla/joomla\\!"],"epss":{"score":0.97252,"percentile":0.99895,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2016-10-27","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":40637,"kind":"exploit","title":"Joomla! 3.4.4 < 3.6.4 - Account Creation / Privilege Escalation","url":"https://www.exploit-db.com/exploits/40637","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/40637.txt","file":"exploits/php/webapps/40637.txt","published":"2016-10-27","added":"2016-10-27","updated":"2016-11-16","author":"Xiphos Research Ltd","type":"webapps","platform":"php","port":80,"verified":false,"codes":["CVE-2016-8869","CVE-2016-8870"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comJoomla_3.4.4-Stable-Full_Package.zip","screenshotUrl":null,"referenceUrl":"https://github.com/XiphosResearch/exploits/tree/master/Joomraa"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 97.3%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privesc","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/93883","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1037108","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html","tags":["Exploit","Technical Description","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://developer.joomla.org/security-centre/660-20161002-core-elevated-privileges.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcf","tags":["Patch"],"source":"cve@mitre.org"},{"url":"https://medium.com/%40showthread/joomla-3-6-4-account-creation-elevated-privileges-write-up-and-exploit-965d8fb46fa2#.rq4qh1v4r","source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/40637/","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privesc","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/93883","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1037108","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html","tags":["Exploit","Technical Description","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://developer.joomla.org/security-centre/660-20161002-core-elevated-privileges.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcf","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://medium.com/%40showthread/joomla-3-6-4-account-creation-elevated-privileges-write-up-and-exploit-965d8fb46fa2#.rq4qh1v4r","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/40637/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-8869","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."}