Blog2Social: Social Media Auto Post & Scheduler <= 8.8.2 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Meta Deletion via 'b2s_reset_social_meta_tags' AJAX Action
Summary
| CVE | CVE-2026-4331 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-03-26 05:16:40 UTC |
| Updated | 2026-03-30 13:26:50 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 4.3 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS: 0.000460000 probability, percentile 0.141180000 (date 2026-04-01)
Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| 3.1 | CNA | DECLARED | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Pr-gateway | Blog2Social Social Media Auto Post Scheduler | affected * 8.8.2 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Loader.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Loader.php | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/7dc46bc4-ecfb-438f-b951-7b957... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/blog2social/tags/8.8.3/includes/Ajax/Post.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Mariusz Maik (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-03-17T14:08:09.000Z | Vendor Notified |
| CNA | 2026-03-25T14:26:40.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.