Limit Login Attempts Reloaded < 3.3.5 - Username Denylist Bypass via Case Variant and Account Email

The Limit Login Attempts Reloaded WordPress plugin before 3.3.5 does not compare logins against its username denylist case-insensitively and does not account for the account's email address, allowing an account an administrator intended to block from logging in to authenticate anyway.

Limit Login Attempts <= 1.7.1 - Unauthenticated Stored Cross-Site Scripting

The Limit Login Attempts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via its lock logging feature in versions up to, and including, 1.7.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator accesses the plugin's settings page. This only works when the plugin prioritizes use of the X-FORWARDED-FOR header, which can be configured in its settings.

Limit Login Attempts Plus <= 1.1.0 - IP Address Spoofing to Protection Mechanism Bypass

The Limit Login Attempts Plus plugin for WordPress is vulnerable to IP Address Spoofing in versions up to, and including, 1.1.0. This is due to insufficient restrictions on where the IP Address information is being retrieved for request logging and login restrictions. Attackers can supply the X-Forwarded-For header with with a different IP Address that will be logged and can be used to bypass settings that may have blocked out an IP address or country from logging in.

Limit Login Attempts < 1.7.2 - Subscriber+ Stored XSS

The Limit Login Attempts WordPress plugin through 1.7.2 does not sanitize and escape usernames when outputting them back in the logs dashboard, which could allow any authenticated users, such as subscriber to perform Stored Cross-Site Scripting attacks

Limit Login Attempts (Spam Protection) < 5.1 - Unauthenticated SQLi

The Limit Login Attempts (Spam Protection) WordPress plugin before 5.1 does not sanitise and escape some parameters before using them in SQL statements via AJAX actions (available to unauthenticated users), leading to SQL Injections

Limit Login Attempts < 4.0.50 - Unauthenticated Stored Cross-Site Scripting

The Limit Login Attempts WordPress plugin before 4.0.50 does not escape the IP addresses (which can be controlled by attacker via headers such as X-Forwarded-For) of attempted logins before outputting them in the reports table, leading to an Unauthenticated Stored Cross-Site Scripting issue.

The Limit Login Attempts plugin before 1.7.1 for WordPress does not clear auth cookies upon a lockout, which might make it easier for remote attackers to conduct brute-force authentication attempts.