Executive brief
The Blog2Social plugin for WordPress, which automates social media posting, contains a security flaw that allows logged-in users to delete social media posts scheduled or published by other users. This could lead to unauthorized removal of content and disruption of a company's social media marketing workflows. An attacker only needs basic account access to the WordPress site to exploit this issue.
Technical details
The Blog2Social plugin for WordPress is vulnerable to an Insecure Direct Object Reference (IDOR) / Missing Authorization flaw in the B2S_Post_Tools::deleteUserPublishPost() and B2S_Post_Tools::deleteUserSchedPost() functions. These functions fail to include a 'blog_user_id' constraint in their database queries, meaning they do not verify if the user requesting the deletion actually owns the record. An authenticated attacker can exploit this by providing arbitrary sequential values to the 'postId' parameter, allowing them to soft-delete published or scheduled social media post records belonging to any other user. The vulnerability is present in all versions up to 8.9.0.
Affected products
- Blog2Social Blog2Social: Social Media Auto Post & Scheduler up to, and including, 8.9.0
Timeline
- 2026-05-13: disclosed
- 2026-05-13: advisory
References
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/B2S/Post/Tools.php
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/B2S/Post/Tools.php
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.9.0/includes/Ajax/Post.php
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.9.0/includes/Ajax/Post.php
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.9.0/includes/B2S/Post/Tools.php