The WP Activity Log plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the user_id parameter in all versions up to, and including, 5.2.1 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 administrative user accesses an injected page.

The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

Insertion of Sensitive Information into Log File vulnerability in WP 2FA allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects WP 2FA: from n/a through 2.6.3.

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in Melapress MelaPress Login Security allows PHP Remote File Inclusion.This issue affects MelaPress Login Security: from n/a through 1.3.0.

The Admin Notices Manager plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the handle_ajax_call() function in all versions up to, and including, 1.4.0. This makes it possible for authenticated attackers, with subscriber-level access and above, to retrieve a list of registered user emails.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Melapress WP 2FA allows Reflected XSS.This issue affects WP 2FA: from n/a through 2.6.2.

Improper Authentication vulnerability in Melapress WP 2FA allows Authentication Bypass.This issue affects WP 2FA: from n/a through 2.2.0.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Melapress WP Activity Log allows Stored XSS.This issue affects WP Activity Log: from n/a through 4.6.1.

The WP 2FA – Two-factor authentication for WordPress plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.5.0. This is due to missing or incorrect nonce validation on the send_backup_codes_email function. This makes it possible for unauthenticated attackers to send emails with arbitrary content to registered users via a forged request granted they can trick a site administrator or other registered user into performing an action such as clicking on a link. While a nonce check is present, it is only executed if a nonce is set. By omitting a nonce from the request, the check can be bypassed.