CVE-2017-16634 Auth bypass in n/a
Attackers can bypass two-factor authentication in Joomla, allowing unauthorized access to user accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-16634?
CVE-2017-16634 is a critical authentication bypass vulnerability in Joomla Joomla\!, published on 9 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Joomla! before 3.8.2, a bug allowed third parties to bypass a user's 2-factor authentication method.
Weakness: CWE-287
Which versions are affected by CVE-2017-16634?
It affects 1 product.
Products include Joomla Joomla\!.
How do I fix CVE-2017-16634?
No fix has been published for CVE-2017-16634 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2017-16634 being exploited?
There is no known exploitation of CVE-2017-16634 in the wild and no public exploit code.
Other vulnerabilities in Joomla Joomla\!
- CVE-2016-10033 PHPMailer Command Injection
- CVE-2023-23752 Joomla! Improper Access Control
- CVE-2026-48902 Joomla! Core - [20260518] - Transport encryption downgrade for password and username reset links
- CVE-2025-25226 [20250401] - Joomla Framework - SQL injection vulnerability in quoteNameStr method of Database package
- CVE-2022-23795 [20220303] - Core - User row are not bound to a authentication mechanism
Sources
Also known as GHSA-gvx5-4gv6-j85j.