The import_data function of the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4 had no capability or nonce checks making it possible for unauthenticated users to import a set of site redirects.

A lack of capability checks and insufficient nonce check on the AJAX action in the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4, made it possible for authenticated users to install arbitrary plugins on vulnerable sites.

Unvaludated input in the 301 Redirects - Easy Redirect Manager WordPress plugin, versions before 2.51, did not sanitise its "Redirect From" column when importing a CSV file, allowing high privilege users to perform SQL injections.

The "301 Redirects - Easy Redirect Manager" plugin before 2.45 for WordPress allows users (with subscriber or greater access) to modify, delete, or inject redirect rules, and exploit XSS, with the /admin-ajax.php?action=eps_redirect_save and /admin-ajax.php?action=eps_redirect_delete actions. This could result in a loss of site availability, malicious redirects, and user infections. This could also be exploited via CSRF.

The Easy Digital Downloads (EDD) Conditional Success Redirects extension for WordPress, as used with EDD 1.8.x before 1.8.7, 1.9.x before 1.9.10, 2.0.x before 2.0.5, 2.1.x before 2.1.11, 2.2.x before 2.2.9, and 2.3.x before 2.3.7, has XSS because add_query_arg is misused.

The simple-301-redirects-addon-bulk-uploader plugin through 1.2.4 for WordPress has no requirement for authentication for action=bulk301export or action=bulk301clearlist.

The simple-301-redirects-addon-bulk-uploader plugin before 1.2.5 for WordPress has no protection against 301 redirect rule injection via a CSV file.