{"id":"CVE-2016-9838","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-9838","generatedAt":"2026-10-28T20:47:02.418Z","title":"An issue was discovered in components/com_users/models/registration.php in Joomla! before 3.6.5.","description":"An issue was discovered in components/com_users/models/registration.php in Joomla! before 3.6.5. Incorrect filtering of registration form data stored to the session on a validation error enables a user to gain access to a registered user's account and reset the user's group mappings, username, and password, as demonstrated by submitting a form that targets the `registration.register` task.","published":"2016-12-16T09:59:00.000Z","lastModified":"2026-06-17T00:56:38.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-284"],"affected":["joomla/joomla\\!"],"epss":{"score":0.14099,"percentile":0.96547,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.11581,"percentile":0.959},{"date":"2026-09-22","score":0.14099,"percentile":0.96396}]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2017-01-20","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":41157,"kind":"exploit","title":"Joomla! < 3.6.4 - Admin Takeover","url":"https://www.exploit-db.com/exploits/41157","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/41157.py","file":"exploits/php/webapps/41157.py","published":"2017-01-20","added":"2017-01-25","updated":"2018-07-18","author":"Charles Fol","type":"webapps","platform":"php","port":null,"verified":false,"codes":["CVE-2016-9838"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.ambionics.io/blog/cve-2016-9838-joomla-account-takeover-and-remote-code-execution"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 14.1%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/94893","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/41157/","source":"cve@mitre.org"},{"url":"https://www.joomla.org/announcements/release-news/5693-joomla-3-6-5-released.html","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/94893","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/41157/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.joomla.org/announcements/release-news/5693-joomla-3-6-5-released.html","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-9838","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."}