What’s Vulnerable › Vulnerabilities

CVE-2026-89031: Blog2Social WordPress Plugin < 9.1.0 Broken Access Control via b2s_calendar_move_post

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-09-24
• Weakness: CWE-639

Description

Adenion Blog2Social plugin for WordPress before 9.1.0 allows low-privileged users to modify the scheduled post records of other users. The b2s_calendar_move_post AJAX handler in includes/Ajax/Post.php issues an UPDATE against the b2s_posts table using only the attacker-supplied b2s_id primary key with no blog_user_id ownership constraint, allowing any user with the edit_posts capability to reschedule, suppress, or alter the publication state of any other user's scheduled social media post.

Affected products

• pr-gateway Blog2Social: Social Media Auto Post & Scheduler: before 9.1.0 — fixed in 9.1.0

How to fix

Upgrade to a fixed version: pr-gateway Blog2Social: Social Media Auto Post & Scheduler 9.1.0. Check the vendor advisory for mitigations.

References

• https://wordpress.org/plugins/blog2social/#developers
• https://www.vulncheck.com/advisories/blog2social-wordpress-plugin-broken-access-control-via-b2s-calendar-move-post

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