Cross-Site Request Forgery (CSRF) vulnerability in Microkid Related Posts for WordPress allows Cross-Site Scripting (XSS).This issue affects Related Posts for WordPress: from n/a through 4.0.3.

Cross-Site Request Forgery (CSRF) vulnerability in Data443 Inline Related Posts.This issue affects Inline Related Posts: from n/a through 3.3.1.

The Inline Related Posts WordPress plugin before 3.6.0 is missing authorization in an AJAX action to ensure that users are allowed to see the content of the posts displayed, allowing any authenticated user, such as subscriber to retrieve the content of password protected posts

The Inline Related Posts WordPress plugin before 3.5.0 does not sanitise and escape some of its settings, which could allow high privilege users such as Admin to perform Cross-Site Scripting attacks even when unfiltered_html is disallowed

The Related Posts for WordPress plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.2.1. This is due to missing or incorrect nonce validation on the handle_create_link() function. This makes it possible for unauthenticated attackers to add related posts to other posts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. This ultimately makes it possible for attackers to view draft and password protected posts.

The YARPP – Yet Another Related Posts Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 5.30.9 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 YARPP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'className' parameter in versions up to, and including, 5.30.3 due to insufficient input sanitization and output escaping. This makes it possible for contributor-level attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The YARPP WordPress plugin before 5.30.3 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

The Contextual Related Posts WordPress plugin before 3.3.1 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

Cross-site Scripting (XSS) - Stored in GitHub repository barrykooij/related-posts-for-wp prior to 2.1.3.