The Post Sync WordPress plugin through 1.1 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.

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 Sync Post With Other Site plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'sps_add_update_post' function in all versions up to, and including, 1.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, to create new draft posts and update existing posts.

Cross-Site Request Forgery (CSRF) vulnerability in kp4coder Sync Post With Other Site allows Cross-Site Scripting (XSS).This issue affects Sync Post With Other Site: from n/a through 1.5.1.