Numerous Plugins and Themes from the AccessPress Themes (aka Access Keys) vendor are backdoored due to their website being compromised. Only plugins and themes downloaded via the vendor website are affected, and those hosted on wordpress.org are not. However, all of them were updated or removed to avoid any confusion
The Form Store to DB WordPress plugin before 1.1.1 does not sanitise and escape parameter keys before outputting it back in the created entry, allowing unauthenticated attacker to perform Cross-Site Scripting attacks against admin
The Cookie Notification Plugin for WordPress plugin before 1.0.9 does not sanitise or escape the id GET parameter before using it in a SQL statement, when retrieving the setting to edit in the admin dashboard, leading to an authenticated SQL Injection
Unvalidated input in the AccessPress Social Icons plugin, versions before 1.8.1, did not sanitise its widget attribute, allowing accounts with post permission, such as author, to perform SQL injections.
An issue was discovered in the AccessKeys AccessPress Anonymous Post Pro plugin through 3.1.9 for WordPress. Improper input sanitization allows the attacker to override the settings for allowed file extensions and upload file size, related to inc/cores/file-uploader.php and file-uploader/file-uploader-class.php. This allows the attacker to upload anything they want to the server, as demonstrated by an action=ap_file_upload_action&allowedExtensions[]=php request to /wp-admin/admin-ajax.php that results in a .php file upload and resultant PHP code execution.