What’s Vulnerable › Vulnerabilities

CVE-2016-8869

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 97.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2016-11-04 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Joomla!: through 3.6.3

References

• http://www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privesc
• http://www.securityfocus.com/bid/93883
• http://www.securitytracker.com/id/1037108
• https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html
• https://developer.joomla.org/security-centre/660-20161002-core-elevated-privileges.html
• https://github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcf
• https://medium.com/%40showthread/joomla-3-6-4-account-creation-elevated-privileges-write-up-and-exploit-965d8fb46fa2#.rq4qh1v4r
• https://www.exploit-db.com/exploits/40637/
• http://www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privesc
• http://www.securityfocus.com/bid/93883
• http://www.securitytracker.com/id/1037108
• https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html

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