High June 16, 2026

CVE-2026-39587: Security Advisory

CVE-2026-39587 CVSS 8.1

Who it affects: Unauthenticated Privilege Escalation in WP BASE Booking <= 5.9.0 versions.
What to do: Apply the vendor's update in your next patch window.

Deploy the fix with Action1 Automox ManageEngine Patch Manager Plus ManageEngine Endpoint Central Are you exposed? Compare patch tools →

CVE-2026-39587 is a high-severity vulnerability (CVSS 8.1).

Summary

Unauthenticated Privilege Escalation in WP BASE Booking <= 5.9.0 versions.

Remediation

Apply the vendor’s update during your next patch window and verify exposure. Patch-management tools that can deploy and verify the fix include Action1, Automox, ManageEngine Patch Manager Plus, ManageEngine Endpoint Central. See our best patch management ranking.

Sources

https://patchstack.com/database/wordpress/plugin/wp-base-booking-of-appointments-services-and-events/vulnerability/wordpress-wp-base-booking-plugin-5-9-0-privilege-escalation-vulnerability?_s_id=cve

Data as of June 16, 2026. Sources: nvd.nist.gov, patchstack.com. Figures are pulled from public vendor and security data and refreshed automatically.