CVE-2016-9838

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 14.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2016-12-16 · updated 2026-06-17
Weakness: CWE-284

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.

Affected products

Joomla!: through 3.6.4

References

http://www.securityfocus.com/bid/94893
https://www.exploit-db.com/exploits/41157/
https://www.joomla.org/announcements/release-news/5693-joomla-3-6-5-released.html
http://www.securityfocus.com/bid/94893
https://www.exploit-db.com/exploits/41157/
https://www.joomla.org/announcements/release-news/5693-joomla-3-6-5-released.html

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