CVE-2026-4331
Unauthorized Data Deletion in Blog2Social WordPress Plugin
Publication date: 2026-03-26
Last updated on: 2026-03-26
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| blog2social | blog2social | to 8.8.2 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-862 | The product does not perform an authorization check when an actor attempts to access a resource or perform an action. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The Blog2Social WordPress plugin (versions up to and including 8.8.2) has a vulnerability that allows authenticated users with Subscriber-level access or higher to delete important social media metadata from the website's database.
This happens because the plugin's resetSocialMetaTags() function only checks if the user has the 'read' capability and a valid security nonce. However, the plugin grants the 'blog2social_access' capability to all user roles upon activation, including Subscribers, allowing them to access admin pages where the nonce is available.
As a result, an attacker with Subscriber-level access can exploit this 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.
How can this vulnerability impact me? :
This vulnerability can lead to unauthorized data loss by allowing low-privileged authenticated users to delete all custom social media meta tags associated with posts on your WordPress site.
The deletion of these meta tags can disrupt social media sharing features, potentially affecting how your content is displayed or promoted on social platforms.
Since the deletion is permanent, recovery may require restoring from backups or manually re-adding the lost metadata, which can be time-consuming and costly.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
The Blog2Social plugin includes an AJAX method named debugConnection() that performs server connectivity tests by running traceroute commands to specific IP addresses. This method can be used to check network connectivity and potentially detect anomalies related to plugin communication.
To detect exploitation attempts or suspicious activity related to this vulnerability, you can monitor for unauthorized AJAX requests to the plugin's endpoints, especially those that invoke the resetSocialMetaTags() function or other AJAX actions that modify post meta data.
Suggested commands to investigate on your server or network include running traceroute to the plugin's target IPs as done by the plugin's debugConnection() method:
- On Unix/Linux/macOS: traceroute -T 178.77.85.168
- On Windows: tracert 178.77.85.168
Additionally, monitoring WordPress logs or web server access logs for AJAX calls to wp-admin/admin-ajax.php with parameters related to Blog2Social (e.g., wp_ajax_b2s_* actions) can help detect attempts to exploit the vulnerability.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include updating the Blog2Social plugin to version 8.8.3 or later, where security patches have been applied to enforce stricter permission checks and nonce verification to prevent unauthorized data deletion.
If updating is not immediately possible, restrict user roles that have Subscriber-level access or higher from accessing the plugin's admin pages, as the vulnerability allows any authenticated user with such access to delete all _b2s_post_meta records.
Review and tighten capability assignments related to 'blog2social_access' to ensure it is not granted to all roles indiscriminately.
Monitor and audit AJAX requests to the plugin's endpoints, and consider disabling or restricting AJAX actions that modify post meta data until the patch can be applied.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability in the Blog2Social WordPress plugin allows authenticated users with Subscriber-level access to delete all custom social media meta tags from the site's database. This unauthorized data loss could impact data integrity and availability, which are important aspects of compliance with standards like GDPR and HIPAA.
However, the provided information does not explicitly discuss the vulnerability's direct impact on compliance with regulations such as GDPR or HIPAA, nor does it mention any personal data exposure or breach of confidentiality.
Therefore, while the vulnerability could potentially affect compliance by causing data loss, there is no specific information available in the provided context or resources about its direct implications on regulatory compliance.