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CVE-2016-9838 is a vulnerability in Joomla! before version 3.6.5, specifically in the components/com_users/models/registration.php file. The vulnerability arises from improper filtering of registration form data that is stored in the session when a validation error occurs. This flaw allows an attacker to submit a specially crafted registration form targeting the registration.register task, enabling them to gain access to an existing registered user's account and reset the user's group mappings, username, and password.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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No public activity observed for this vulnerability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
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