Junglewise Threat Intelligence

CVE-2026-9851: Booking Package WordPress plugin privilege escalation in package_app_action

CVE-2026-9851 · Severity: high · CVSS 7.2 · Published 2026-06-06

Technologies: Booking Package. Vendors: Booking Package.

Executive brief

The Booking Package plugin for WordPress, which provides appointment and reservation management, contains a security flaw that allows certain users to take over other accounts. An attacker with Editor-level access can change the email address and password of any user, including site administrators. This can lead to a complete takeover of the website and its data.

Technical details

The Booking Package plugin for WordPress is vulnerable to privilege escalation via account takeover in versions up to, and including, 1.7.16. This is due to a missing capability check on the 'updateUser' branch of the package_app_action AJAX endpoint. While the handler validates a nonce, the dispatcher invokes Schedule::updateUser() with a hard-coded administrator argument set to 1, which bypasses internal owner-restriction checks. This allows an authenticated attacker with Editor-level permissions or higher to provide arbitrary user IDs to the wp_update_user() function, enabling them to change passwords and email addresses for any account, including Administrators.

Affected products

  • Booking Package Booking Package up to, and including, 1.7.16

Timeline

  • 2026-06-06: disclosed
  • 2026-06-06: advisory

References

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