CVE-2026-9851 Details
Description
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, where the handler only validates a nonce and the dispatcher invokes Schedule::updateUser() with the $administrator argument hard-coded to 1, bypassing the only owner-restriction check inside that function and allowing the target user to be determined solely by attacker-supplied input passed directly to wp_update_user(). This makes it possible for authenticated attackers, with Editor-level access and above, to change the email address and password of any account, including Administrator accounts, resulting in a full site takeover.
A privilege escalation vulnerability allowing account takeover has been identified in the Booking Package plugin for WordPress, affecting versions through 1.7.16. The issue arises from a missing capability check on the 'updateUser' branch of the package_app_action AJAX endpoint. The handler only verifies a nonce, while the Schedule::updateUser() function is called with the $administrator argument hard-coded to 1. This bypasses the sole owner-restriction check in that function, allowing the target user to be determined based on attacker-supplied input directly passed to wp_update_user(). As a result, authenticated attackers with Editor-level access or higher can change the email address and password of any user, including Administrators, leading to a complete site takeover.
Users are advised to update the Booking Package plugin to version 1.7.17 or a newer patched version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 6, 2026CISA-ADP
Assessed Jun 6, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Booking Package | <= 1.7.16 (semver) |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 6, 2026 | New CVE Received | [email protected] |