The AdForest theme for WordPress is vulnerable to authentication bypass in all versions up to, and including, 5.1.8. This is due to the plugin not properly verifying a user's identity prior to logging them in as that user. This makes it possible for unauthenticated attackers to authenticate as any user as long as they have configured OTP login by phone number.
The product requires authentication, but the product has an alternate path or channel that does not require authentication.
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.