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 Simple Ajax Chat WordPress plugin before 20240412 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

The Simple Ajax Chat – Add a Fast, Secure Chat Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 20231101 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

The Simple Ajax Chat WordPress plugin before 20240223 does not prevent visitors from using malicious Names when using the chat, which will be reflected unsanitized to other users.

Cross-Site Request Forgery (CSRF) in Simple Ajax Chat (WordPress plugin) <= 20220115 allows an attacker to clear the chat log or delete a chat message.

Sensitive Information Disclosure (sac-export.csv) in Simple Ajax Chat (WordPress plugin) <= 20220115

Unauthenticated Stored Cross-Site Scripting (XSS) in Simple Ajax Chat <= 20220115 allows an attacker to store the malicious code. However, the attack requires specific conditions, making it hard to exploit.