The Login with phone number plugin for WordPress is vulnerable to privilege escalation in all versions up to, and including, 1.7.49. This is due to a lack of validation and missing capability check on user-supplied data in the 'lwpupdatepasswordaction' function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update their role to any other role, including Administrator. The vulnerability was partially patched in version 1.7.40. The login with phone number pro plugin was required to exploit the vulnerability in versions 1.7.40 - 1.7.49.

The Login with phone number plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.5.6. This is due to missing nonce validation on the 'lwpupdatepasswordaction' function. This makes it possible for unauthenticated attackers to change user password via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Hamid Alinia Login with phone number login-with-phone-number.This issue affects Login with phone number: from n/a through <= 1.7.35.