CVE-2026-89029

Medium

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.

SeverityMedium

CVSS4.3

Exploit probability—

ProductBlog2Social

PublishedSep 16, 2026

First seenSep 16, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

Adenion Blog2Social9.1.0 or later

Patches

wordpress.org/plugins/blog2social/#developers

Affected products

Product	Affected versions	Fixed in
Adenion Blog2Social	v < 9.1.0	9.1.0

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