CVE-2026-89030

MEDIUMCVSS 4.3

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.

Timeline

Published:September 16th, 2026 2:17 PM

Last modified:September 24th, 2026 8:43 PM

CVSS Scoring

CVSS v3: 4.3 (MEDIUM)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weaknesses (CWE)

CWE-862

References & Reports

Advisories, patches, and third-party reports

https://wordpress.org/plugins/blog2social/#developers
https://www.vulncheck.com/advisories/blog2social-wordpress-plugin-user-email-disclosure-via-b2s-search-user

Source: NIST NVD · Data may lag official sources by up to one minute