CVE-2016-8869
The register method in the UsersModelRegistration class in controllers/user.php in the Users...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2016-8869- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2016-8869- Updated
- 2026-11-02
EUVDEUVD-2016-9694 No score
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.
- Record
EUVD-2016-9694- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v4hj-3rpq-j2ch
The register method in the UsersModelRegistration class in controllers/user.php in the Users...
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.
- Record
GHSA-v4hj-3rpq-j2ch- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2016-8869- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Joomla! 3.4.4 < 3.6.4 - Account Creation / Privilege Escalation | 2016-10-27 |
| Metasploit | Joomla Account Creation and Privilege Escalation | 2016-10-25 |
| PoC in GitHub | cved-sources/cve-2016-8869 | 2019-01-11 |
| PoC in GitHub | rustyJ4ck/JoomlaCVE20168869 | 2016-11-10 |
| PoC in GitHub | zugetor/Joomla-3.4.4-3.6.4_CVE-2016-8869_and_CVE-2016-8870 | 2016-11-02 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, Metasploit, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-8869 is a critical vulnerability (CVSS 9.8) in Joomla Joomla\!, published November 4, 2016. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 97.3%, the 99th percentile. No source names a fixed version.
References
developer.joomla.org/security-centre/660-20161002-core-elevated-privileges.html
securityfocus.com/bid/93883
blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html
rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privesc
exploit-db.com/exploits/40637
securitytracker.com/id/1037108
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github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcf
medium.com/%40showthread/joomla-3-6-4-account-creation-elevated-privileges-write-up-and-exploit-965d8fb46fa2
nvd.nist.gov/vuln/detail/CVE-2016-8869