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CVE-2016-8870

The register method in the UsersModelRegistration class in controllers/user.php in the Users...

8.1 HighPublic exploit

The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4, when registration has been disabled, allows remote attackers to create user accounts by leveraging failure to check the Allow User Registration configuration setting.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

81.1%Up 18.0 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 8.1

The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4, when registration has been disabled, allows remote attackers to create user accounts by leveraging failure to check the Allow User Registration configuration setting.

Record
CVE-2016-8870
CVSS 3.0
8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/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, when registration has been disabled, allows remote attackers to create user accounts by leveraging failure to check the Allow User Registration configuration setting.

Record
CVE-2016-8870
Updated
2026-11-02
EUVDEUVD-2016-9695 No score

The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4, when registration has been disabled, allows remote attackers to create user accounts by leveraging failure to check the Allow User Registration configuration setting.

Record
EUVD-2016-9695
Updated
2026-11-03
GitHub AdvisoriesGHSA-f3v8-7jfc-xgvg 8.1

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, when registration has been disabled, allows remote attackers to create user accounts by leveraging failure to check the Allow User Registration configuration setting.

Record
GHSA-f3v8-7jfc-xgvg
CVSS 3.0
8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-20
Updated
2026-11-02
OSV 8.1

The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4, when registration has been disabled, allows remote attackers to create user accounts by leveraging failure to check the Allow User Registration configuration setting.

Record
CVE-2016-8870
CVSS 3.0
8.1 HighCVSS:3.0/AV:N/AC:H/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.

Public exploits
SourceLinkDate
Exploit-DBJoomla! 3.4.4 < 3.6.4 - Account Creation / Privilege Escalation2016-10-27
MetasploitJoomla Account Creation and Privilege Escalation2016-10-25
PoC in GitHubcved-sources/cve-2016-88702019-01-11

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE 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-2016-8870 is a high vulnerability (CVSS 8.1) in Joomla Joomla\!, published November 4, 2016. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 81.1%, the 99th percentile. No source names a fixed version.

References

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