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

Quick assessment

Affected
Adenion Blog2Social
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 9.1.0 之前的 Adenion Blog2Social WordPress 插件中，低权限用户可以枚举 WordPress 用户账户。具体来说， 中的 AJAX 处理函数会将 参数中提供的任意用户 ID 解析为显示名称，但未验证调用者是否有权限读取用户账户数据。这使得任何拥有 权限的用户都能将 WordPress 用户 ID 映射到显示名称，并确认任意 ID 对应的账户是否存在。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1087.002 · Domain Account
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I. Basic Information for CVE-2026-89029

Vulnerability Information
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Vulnerability Title
Blog2Social WordPress Plugin < 9.1.0 User Enumeration via AJAX Handler
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Adenion Blog2Social 0 ~ 9.1.0 -

II. Public POCs for CVE-2026-89029

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III. Intelligence Information for CVE-2026-89029

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Vendor Advisories for CVE-2026-89029 (1)

Vendor Pages for CVE-2026-89029 (1)

Same Patch Batch · Adenion · 2026-09-16 · 3 CVEs total

CVE-2026-89031 5.4 MEDIUM Blog2Social WordPress Plugin < 9.1.0 Broken Access Control via b2s_calendar_move_post
CVE-2026-89030 4.3 MEDIUM Blog2Social WordPress Plugin < 9.1.0 User Email Disclosure via b2s_search_user

IV. Related Vulnerabilities

Same product: Blog2Social
Same vendor: Adenion
Same weakness: CWE-639

V. Comments for CVE-2026-89029

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