Vulnerability · Published Sep 16, 2026 · Assigned by VulnCheck

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

Medium 4.3

In plain English

A medium-severity missing authorization in Blog2Social from Adenion. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 79.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Adenion	Blog2Social	0 – before 9.1.0

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

WordPress Changelog release-notes, patch
https://www.vulncheck.com/advisories/blog2social-wordpress-plugin-user-email-disclosure-via-b2s-search-user third-party-advisory