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.

The WP Activity Log Premium plugin for WordPress is vulnerable to SQL Injection via the entry->roles parameter in all versions up to, and including, 4.6.4 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers with subscriber privileges to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. One demonstrated attack included the injection of a PHP Object.

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 Activity Log for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.5.0. This is due to missing or incorrect nonce validation on the ajax_run_cleanup function. This makes it possible for unauthenticated attackers to invoke this function via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The WP Activity Log Premium plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.5.0. This is due to missing or incorrect nonce validation on the ajax_switch_db function. This makes it possible for unauthenticated attackers to make changes to the plugin's settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The WP Activity Log Premium plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajax_switch_db function in versions up to, and including, 4.5.0. This makes it possible for authenticated attackers with subscriber-level or higher to make changes to the plugin's settings.

The WP Activity Log plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the handle_ajax_call function in versions up to, and including, 4.5.0. This makes it possible for authenticated attackers, with subscriber-level access or higher, to obtain a list of users with accounts on the site. This includes ids, usernames and emails.

The WP Activity Log plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the setup_page function in versions up to, and including, 4.0.1. This makes it possible for unauthenticated attackers to run the setup wizard (if it has not been run previously) and access plugin configuration options.