Executive brief
Blog2Social is a WordPress plugin for automatically scheduling and sharing website content across multiple social media platforms. A privilege escalation flaw allows any user with basic post editing permissions to modify, reschedule, or suppress other users' scheduled social media posts, potentially disrupting marketing campaigns and publication workflows across multiple social networks.
Technical details
The vulnerability is a broken access control issue (CWE-639) in the b2s_calendar_move_post AJAX handler within includes/Ajax/Post.php. The handler performs UPDATE operations on the b2s_posts table using only the attacker-supplied b2s_id primary key without validating that the requesting user owns the record via a blog_user_id constraint. Any authenticated user with the edit_posts WordPress capability can manipulate scheduled post records belonging to other users, altering publication state, suppressing posts, or rescheduling them. The vulnerability requires network access and valid WordPress authentication with edit_posts capability, but no additional user interaction. The issue is patched in version 9.1.0.
Affected products
- Adenion Blog2Social before 9.1.0
Timeline
- 2026-09-16: disclosed