CVE-2025-14440
CWE-565Published: December 13, 2025· Updated: Jun 17, 2026
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.
Risk Analysis
The JAY Login & Register plugin for WordPress (up to 2.4.01) contains an authentication bypass vulnerability due to improper cookie handling. This allows unauthenticated remote attackers to log in as any user, including administrators, if the user ID is known.
No public exploit is known for this specific flaw, and it is not in the CISA KEV.
Update the JAY Login & Register plugin to the latest available version or disable the plugin until a fix is applied.
Technical Analysis
CVE-2025-14440 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
All References (3)
Quick Facts
Related CVEs (CWE-565)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-14440 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts