---
id: CVE-2026-89030
title: >-
  Adenion Blog2Social plugin for WordPress before 9.1.0 exposes the email
  addresses of all registered WordPress users to low-privileged accounts
summary: >-
  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 …
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-862
vendor: Adenion
product: Blog2Social
affected:
  - Blog2Social < 9.1.0
published: '2026-09-16'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:43:32.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89030'
references:
  - url: 'https://wordpress.org/plugins/blog2social/#developers'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/blog2social-wordpress-plugin-user-email-disclosure-via-b2s-search-user
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00281
epssPercentile: 0.18347
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-16T15:26:03.362672Z'
ingestedAt: '2026-09-16T14:57:28.018Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.