HIGH
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
Published Nov 4, 2016
8.1
HIGHCVSS 3.0
EPSS 81.14%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
8.1 HIGH NVD
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
6.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
81.14% 0.81136
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.81136
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (36 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 81.14% (0.81136) | 99.63th | v5 (v2026.06.15) |
| Jun 15, 2026 | 82.09% (0.82086) | 99.61th | v5 (v2026.06.15) |
| Mar 4, 2026 | 92.24% (0.92242) | 99.71th | v4 (v2025.03.14) |
| Mar 1, 2026 | 90.40% (0.90402) | 99.60th | v4 (v2025.03.14) |
| Feb 4, 2026 | 92.24% (0.92242) | 99.71th | v4 (v2025.03.14) |
| Feb 1, 2026 | 90.40% (0.90402) | 99.60th | v4 (v2025.03.14) |
| Jan 4, 2026 | 91.92% (0.91921) | 99.68th | v4 (v2025.03.14) |
| Jan 1, 2026 | 89.82% (0.89821) | 99.56th | v4 (v2025.03.14) |
| Dec 4, 2025 | 91.92% (0.91921) | 99.68th | v4 (v2025.03.14) |
| Dec 1, 2025 | 89.82% (0.89821) | 99.55th | v4 (v2025.03.14) |
| Nov 4, 2025 | 91.92% (0.91921) | 99.68th | v4 (v2025.03.14) |
| Nov 1, 2025 | 89.82% (0.89821) | 99.55th | v4 (v2025.03.14) |
| Oct 4, 2025 | 91.97% (0.91965) | 99.69th | v4 (v2025.03.14) |
| Oct 1, 2025 | 89.90% (0.89900) | 99.56th | v4 (v2025.03.14) |
| Sep 4, 2025 | 91.97% (0.91971) | 99.69th | v4 (v2025.03.14) |
| Sep 1, 2025 | 89.91% (0.89910) | 99.56th | v4 (v2025.03.14) |
| Aug 4, 2025 | 91.92% (0.91921) | 99.68th | v4 (v2025.03.14) |
| Aug 1, 2025 | 89.82% (0.89821) | 99.56th | v4 (v2025.03.14) |
| Jul 4, 2025 | 91.92% (0.91921) | 99.67th | v4 (v2025.03.14) |
| Jul 1, 2025 | 89.82% (0.89821) | 99.55th | v4 (v2025.03.14) |
| Jun 5, 2025 | 91.92% (0.91921) | 99.67th | v4 (v2025.03.14) |
| Jun 1, 2025 | 89.82% (0.89821) | 99.55th | v4 (v2025.03.14) |
| May 4, 2025 | 91.92% (0.91921) | 99.67th | v4 (v2025.03.14) |
| May 1, 2025 | 89.82% (0.89821) | 99.54th | v4 (v2025.03.14) |
| Apr 5, 2025 | 91.92% (0.91921) | 99.69th | v4 (v2025.03.14) |
| Apr 4, 2025 | 89.82% (0.89821) | 99.55th | v4 (v2025.03.14) |
| Apr 3, 2025 | 91.92% (0.91921) | 99.69th | v4 (v2025.03.14) |
| Apr 2, 2025 | 89.82% (0.89821) | 99.55th | v4 (v2025.03.14) |
| Mar 17, 2025 | 91.77% (0.91770) | 99.68th | v4 (v2025.03.14) |
| Dec 17, 2024 | 77.06% (0.77064) | 98.42th | v3 (v2023.03.01) |
| Aug 12, 2024 | 91.42% (0.91424) | 98.94th | v3 (v2023.03.01) |
| Aug 11, 2024 | 12.32% (0.12321) | 95.49th | v3 (v2023.03.01) |
| Nov 8, 2023 | 91.42% (0.91424) | 98.60th | v3 (v2023.03.01) |
| Mar 7, 2023 | 94.02% (0.94015) | 98.60th | v3 (v2023.03.01) |
| Mar 6, 2023 | 63.11% (0.63109) | 98.97th | v2 (v2022.01.01) |
| Feb 4, 2022 | 63.11% (0.63109) | 98.73th | v2 (v2022.01.01) |
Weaknesses (1)
References (9)
- http://www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privesc x_refsource_MISCThird Party Advisory
- http://www.securityfocus.com/bid/93876 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037107 vdb-entryx_refsource_SECTRACK
- http://www.securitytracker.com/id/1037108 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html x_refsource_MISC
- https://developer.joomla.org/security-centre/659-20161001-core-account-creation.html x_refsource_CONFIRMVendor Advisory
- https://github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcf x_refsource_CONFIRMPatch
- https://medium.com/%40showthread/joomla-3-6-4-account-creation-elevated-privileges-write-up-and-exploit-965d8fb46fa2#.rq4qh1v4r x_refsource_MISC
- https://www.exploit-db.com/exploits/40637/ exploitx_refsource_EXPLOIT-DBThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privesc | x_refsource_MISCThird Party Advisory | |
| http://www.securityfocus.com/bid/93876 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1037107 | vdb-entryx_refsource_SECTRACK | |
| http://www.securitytracker.com/id/1037108 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html | x_refsource_MISC | |
| https://developer.joomla.org/security-centre/659-20161001-core-account-creation.html | x_refsource_CONFIRMVendor Advisory | |
| https://github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcf | x_refsource_CONFIRMPatch | |
| https://medium.com/%40showthread/joomla-3-6-4-account-creation-elevated-privileges-write-up-and-exploit-965d8fb46fa2#.rq4qh1v4r | x_refsource_MISC | |
| https://www.exploit-db.com/exploits/40637/ | exploitx_refsource_EXPLOIT-DBThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Nov 4, 2016
Updated Aug 6, 2024
Reserved Oct 21, 2016
Link CVE-2016-8870
CISA Vulnrichment
Updated n/a