CVE-2026-4331 json
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
published 2026-03-26 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-16104
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- pr-gateway Blog2Social: Social Media Auto Post & Scheduler
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/7dc46bc4-ecfb-438f-b951-7b957489cd96?source=cve
- plugins.trac.wordpress.org /browser/blog2social/trunk/includes/Ajax/Post.php#L1290
- plugins.trac.wordpress.org /browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L1290
- plugins.trac.wordpress.org /browser/blog2social/trunk/includes/Ajax/Post.php#L1281
- plugins.trac.wordpress.org /browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L1281
- plugins.trac.wordpress.org /browser/blog2social/trunk/includes/Ajax/Post.php#L37
- plugins.trac.wordpress.org /browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L37
- plugins.trac.wordpress.org /browser/blog2social/trunk/includes/Loader.php#L2202
- plugins.trac.wordpress.org /browser/blog2social/tags/8.8.2/includes/Loader.php#L2202
- plugins.trac.wordpress.org /browser/blog2social/tags/8.8.3/includes/Ajax/Post.php#L1301
Sources
- CVE List CVE-2026-4331
- NVD CVE-2026-4331
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.