What’s Vulnerable › Vulnerabilities

CVE-2026-89029: Blog2Social WordPress Plugin < 9.1.0 User Enumeration via AJAX Handler

• Severity: medium (CVSS 4.3 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 enumerate WordPress user accounts. The b2s_get_select_mandant_user AJAX handler in includes/Ajax/Get.php resolves arbitrary user IDs supplied in the owner parameter to display names without verifying that the caller is authorized to read user account data, allowing any user with the edit_posts capability to map WordPress user IDs to display names and confirm account existence for arbitrary IDs.

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-user-enumeration-via-ajax-handler

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