Overview
A security vulnerability, identified as CVE-2025-13558, has been discovered in the Blog2Social: Social Media Auto Post & Scheduler plugin for WordPress. This medium-severity vulnerability allows authenticated attackers with Subscriber-level access (and higher roles) to delete arbitrary posts by changing their status to ‘trash’. This is due to a missing capability check on the deleteUserCcDraftPost function within the plugin. All versions up to and including 8.7.0 are affected. This vulnerability can lead to significant disruption and data loss on affected WordPress sites.
Technical Details
The vulnerability stems from the absence of proper authorization checks within the deleteUserCcDraftPost function. This function, intended to be used only by authorized users, lacks the necessary capability checks to verify that the user initiating the action has the required permissions to delete or modify posts. As a result, an attacker with Subscriber-level access can craft a request to trigger this function and delete posts that they would normally not have permission to access. The vulnerable code resides in the Post.php file within the plugin’s directory. The fix involves implementing a capability check to ensure only users with appropriate permissions (e.g., ‘edit_posts’, ‘delete_posts’) can execute the deleteUserCcDraftPost function.
CVSS Analysis
The vulnerability has been assigned a CVSS score of 5.4, indicating a MEDIUM severity. The CVSS vector string is likely to be something similar to AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L. This score reflects the fact that the vulnerability is network exploitable (AV:N), requires low attack complexity (AC:L), requires low privileges (PR:L) (Subscriber level access), requires no user interaction (UI:N), the scope is unchanged (S:U) and that it results in a limited impact to integrity and availability (I:L/A:L), but no impact to confidentiality (C:N).
Possible Impact
The exploitation of CVE-2025-13558 can have the following consequences:
- Data Loss: Important posts and content can be deleted without proper authorization, leading to data loss and disruption of website functionality.
- Website Defacement: While not a direct defacement, the removal of critical content can severely impact the website’s appearance and information available to visitors.
- SEO Impact: Deleting posts can negatively impact the website’s search engine rankings.
- Reputational Damage: The unauthorized deletion of content can erode user trust and damage the website’s reputation.
Mitigation and Patch Steps
The primary mitigation step is to update the Blog2Social plugin to the latest version. Check the WordPress plugin repository or the Blog2Social website for updates. If an update is not immediately available, consider temporarily disabling the Blog2Social plugin until a patched version is released. While awaiting a patch, closely monitor user activity on your WordPress site for any suspicious behavior.
