CVE-2026-4331 Missing authorization in Blog2Social: Social Media Auto Post & Scheduler
Authenticated subscribers can delete all social media meta tags for every post due to insufficient authorization checks in the Blog2Social WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4331?
CVE-2026-4331 is a medium-severity missing authorization vulnerability in pr-gateway Blog2Social: Social Media Auto Post & Scheduler, published on 26 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Blog2Social: Social Media Auto Post & Scheduler plugin for WordPress is vulnerable to unauthorized data loss in all versions up to, and including, 8.8.2. This is due to the resetSocialMetaTags() function only verifying that the user has the 'read' capability and a valid b2s_security_nonce, both of which are available to Subscriber-level users, as the plugin grants 'blog2social_access' capability to all roles upon activation, allowing them to access the plugin's admin pages where the nonce is output. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete all _b2s_post_meta records from the wp_postmeta table, permanently removing all custom social media meta tags for every post on the site.
Weakness: CWE-862
Which versions are affected by CVE-2026-4331?
How do I fix CVE-2026-4331?
No fix has been published for CVE-2026-4331 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-4331 being exploited?
There is no known exploitation of CVE-2026-4331 in the wild and no public exploit code.
Sources
Also known as GHSA-x2p4-4cw9-m5ch.