CVE-2025-14440
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductJAY Login & Register
PublishedDec 13, 2025
First seenDec 13, 2025
Weakness typeCWE-565CWE-565
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| jayarsiech JAY Login & Register | v ≤ 2.4.01 | — |
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