CVE-2016-8870
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 81.1%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 81.14% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · first 27 October 2016
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- joomla/joomla\!
- Source
- cve@mitre.org
EPSS moved from 83.0% on 21 September 2026 to 81.1% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privescThird Party Advisory
- http://www.securityfocus.com/bid/93876Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037107
- http://www.securitytracker.com/id/1037108Third Party Advisory, VDB Entry
- https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html
- https://developer.joomla.org/security-centre/659-20161001-core-account-creation.htmlVendor Advisory
- https://github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcfPatch
- 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/Exploit, Third Party Advisory
- http://www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privescThird Party Advisory
- http://www.securityfocus.com/bid/93876Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037107
- http://www.securitytracker.com/id/1037108Third Party Advisory, VDB Entry
- https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html
- https://developer.joomla.org/security-centre/659-20161001-core-account-creation.htmlVendor Advisory
- https://github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcfPatch
- 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/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.