CVE-2025-14440 JAY Login & Register <= 2.4.01 - Authentication Bypass via Cookie
Unauthenticated attackers can bypass authentication and log in as any user, including administrators, by manipulating a specific cookie value.
- 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-2025-14440?
CVE-2025-14440 is a critical authentication bypass vulnerability in jayarsiech JAY Login & Register, published on 13 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The JAY Login & Register plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.4.01. This is due to incorrect authentication checking in the 'jay_login_register_process_switch_back' function with the 'jay_login_register_process_switch_back' cookie value. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the user id.
Weakness: CWE-565
Which versions are affected by CVE-2025-14440?
How do I fix CVE-2025-14440?
No fix has been published for CVE-2025-14440 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-2025-14440 being exploited?
There is no known exploitation of CVE-2025-14440 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-7wgv-8jv9-78p4.