Blog2Social: Social Media Auto Post & Scheduler <= 9.1.0 — Missing Authorization to Authenticated (Contributor+) Arbitrary Modification via Multiple AJAX Handlers

Am I affected?

• Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Blog2Social: Social Media Auto Post & Scheduler.
• No admin access? Run a passive check of your site. It reads public files only.

What to do

1. Update to version 9.1.1, or a newer patched version
2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
3. Watch Blog2Social: Social Media Auto Post & Scheduler to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Averon Averenkov (Averon Averenkov).

The Blog2Social: Social Media Auto Post & Scheduler plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 9.1.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to view, modify, or delete other users' Blog2Social records, including disclosing another user's network authentication IDs and scheduled post content, overwriting Open Graph and Twitter Card post metadata on posts they do not own, rebinding another user's social-network authorization, and mass-hiding all users' scheduled posts sitewide. The plugin's b2s_security_nonce is emitted on the post-edit meta box, which Contributors can render, making the nonce available to any authenticated user at that role level or above.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

• Advisorywordfence.com

Related CVEs

Timeline

1. Sep 24, 2026

   CVE published

   Severity medium, CVSS 4.3

2. Nov 13, 2026

   Record last updated