Improper input validation in Joomla Joomla\!
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 attackers to gain privileges by leveraging incorrect use of unfiltered data when registering on a site.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.973 (99.9th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 99.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.971 · newest: 0.973 · change: +0.002
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- developer.joomla.org/security-centre/660-20161002-core-elevated-privileges.html (Vendor Advisory)
- www.securityfocus.com/bid/93883 (VDB Entry, Third Party Advisory, vdb-entry)
- blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-jo… (Technical Description, Exploit, Third Party Advisory)
- www.rapid7.com/db/modules/auxiliary/admin/http/joomla_registration_privesc (Third Party Advisory)
- www.exploit-db.com/exploits/40637/ (Exploit, Third Party Advisory, exploit)
- www.securitytracker.com/id/1037108 (VDB Entry, Third Party Advisory, vdb-entry)
- github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcf (Patch)
- medium.com/@showthread/joomla-3-6-4-account-creation-elevated-privileges-write-…
Frequently asked questions
- What is CVE-2016-8869?
- CVE-2016-8869 is a critical-severity vulnerability in Joomla Joomla\!, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2016-11-04.
- How severe is CVE-2016-8869?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2016-8869 known to be exploited?
- 25 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.