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CVE-2026-89030— Blog2Social WordPress Plugin < 9.1.0 User Email Disclosure via b2s_search_user

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.

WordPress 插件 Adenion Blog2Social 在 9.1.0 版本之前，存在一个安全漏洞：它向低权限账户暴露了所有已注册的 WordPress 用户的电子邮件地址。 具体来说，位于 中的 AJAX 处理程序会调用 中的 方法。该方法会返回所有匹配用户的电子邮件地址，且未对调用者进行权限限制（即不要求调用者拥有 权限）。因此，任何拥有 权限的用户都能获取用户（包括管理员）的电子邮件地址。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1078.004 · Cloud Accounts
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I. Basic Information for CVE-2026-89030

Vulnerability Information
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Vulnerability Title
Blog2Social WordPress Plugin < 9.1.0 User Email Disclosure via b2s_search_user
Source: CVE Program / CVE List V5
Vulnerability Description
Adenion Blog2Social plugin for WordPress before 9.1.0 exposes the email addresses of all registered WordPress users to low-privileged accounts. The b2s_search_user AJAX handler in includes/Ajax/Get.php invokes B2S_Tools::searchUser() in includes/Tools.php, which returns the email address of every matching user without restricting access to callers holding the list_users capability, allowing any user with the edit_posts capability to retrieve user email addresses including those of administrators.
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
授权机制缺失
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-2026-89030

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III. Intelligence Information for CVE-2026-89030

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Vendor Advisories for CVE-2026-89030 (1)

Vendor Pages for CVE-2026-89030 (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-2026-89029 4.3 MEDIUM Blog2Social WordPress Plugin < 9.1.0 User Enumeration via AJAX Handler

IV. Related Vulnerabilities

Same product: Blog2Social
Same vendor: Adenion
Same weakness: CWE-862

V. Comments for CVE-2026-89030

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