CVE-2026-4331
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
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.
INFO
Published Date :
March 26, 2026, 5:16 a.m.
Last Modified :
March 26, 2026, 5:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-4331
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Blog2Social plugin to the latest version.
- Verify that only authorized users can access admin pages.
- Review plugin capabilities and role assignments.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-4331.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-4331 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-4331
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-4331 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-4331 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Mar. 26, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Added CWE CWE-862 Added Reference https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L1281 Added Reference https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L1290 Added Reference https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L37 Added Reference https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Loader.php#L2202 Added Reference https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.3/includes/Ajax/Post.php#L1301 Added Reference https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php#L1281 Added Reference https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php#L1290 Added Reference https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php#L37 Added Reference https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Loader.php#L2202 Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/7dc46bc4-ecfb-438f-b951-7b957489cd96?source=cve