Auth bypass in Pr-Gateway Blog2social: Social Media Auto Post & Scheduler
CVE-2026-4331
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/7dc46bc4-ecfb-438f-b951-7b957…
- plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php
- plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php
- plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php
- plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php
- plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php
- plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php
- plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Loader.php
- plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Loader.php
- plugins.trac.wordpress.org/browser/blog2social/tags/8.8.3/includes/Ajax/Post.php
Frequently asked questions
- What is CVE-2026-4331?
- CVE-2026-4331 is a medium-severity vulnerability in Pr-Gateway Blog2social: Social Media Auto Post & Scheduler, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-03-26.
- How severe is CVE-2026-4331?
- Medium severity. CVSS v3 base score is 4.3 out of 10.