# CVE-2026-89030: Adenion Blog2Social WordPress plugin email disclosure to low-privileged users

Source: https://junglewise.ai/threats/cve-2026-89030-adenion-blog2social-wordpress-plugin-email-disclosure-to-low  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-16. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-89030 · Severity: medium · CVSS 4.3 · Published 2026-09-16

Blog2Social is a WordPress plugin that automatically shares website content to social media platforms. A vulnerability in versions before 9.1.0 allows any WordPress user with basic posting capabilities to retrieve and view the email addresses of all registered users on the site, including administrators. This exposes sensitive contact information that could be used for targeted phishing, social engineering, or account takeover attacks.

Technologies: [Adenion Blog2Social](https://junglewise.ai/threats/technologies/blog2social). Vendors: [Adenion](https://junglewise.ai/threats/vendors/adenion).

## Quick answers

**Is CVE-2026-89030 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-89030 being exploited in the wild.

**How severe is CVE-2026-89030?** Medium severity, with a CVSS score of 4.3, published 16 September 2026.

**Which products and versions are affected?** Adenion Blog2Social before 9.1.0.

**Is there a fix for CVE-2026-89030?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-89030 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-89030?** Check whether you run Adenion Blog2Social at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an authorization bypass (CWE-862) in the AJAX handler b2s_search_user located in includes/Ajax/Get.php. This handler calls B2S_Tools::searchUser() in includes/Tools.php, which returns email addresses for matching users without verifying that the caller possesses the list_users capability. Any authenticated user with edit_posts capability (typically Authors and Editors) can invoke this AJAX endpoint over the network to enumerate and retrieve email addresses of all WordPress users, including privileged administrators. The vulnerability was patched in version 9.1.0.

## Affected products

- Adenion Blog2Social before 9.1.0

## Timeline

- 2026-09-16: disclosed

## References

- [https://wordpress.org/plugins/blog2social/](https://wordpress.org/plugins/blog2social/)
- [https://www.vulncheck.com/advisories/blog2social-wordpress-plugin-user-email-disclosure-via-b2s-search-user](https://www.vulncheck.com/advisories/blog2social-wordpress-plugin-user-email-disclosure-via-b2s-search-user)

## Related threats

- [Adenion Blog2Social privilege escalation in post scheduling](https://junglewise.ai/threats/cve-2026-89031-adenion-blog2social-privilege-escalation-in-post-scheduling)
- [Adenion Blog2Social WordPress plugin user enumeration via AJAX handler](https://junglewise.ai/threats/cve-2026-89029-adenion-blog2social-wordpress-plugin-user-enumeration-via-ajax)
- [Adenion Blog2Social unauthenticated XSS](https://junglewise.ai/threats/cve-2026-56044-adenion-blog2social-unauthenticated-xss)