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.
CVE-2026-9851 is a high severity with CVSS 7.2 Authorization Bypass issue affecting the Plugin Booking Package. It affects Versions up to 1.7.16 and is fixed in 1.7.17.
Use the related hub and response guides to connect this CVE-2026-9851 report with patch validation, scanner checks, and site hardening work.
Open the grouped hub for related CVEs, affected ranges, severity mix, and patch coverage.
Check access, XML-RPC exposure, backup readiness, and monitoring after patching.
Use containment, evidence capture, remediation, and validation steps when exploit risk is high.
CVE-2026-9851 is tracked for the Plugin Booking Package as high severity with CVSS 7.2. The affected range is Versions up to 1.7.16. Update Booking Package to 1.7.17 or newer where that version is compatible with the site.
Search engines and operators need more than a title. This page exposes the identifier, affected range, patch evidence, and source coverage that make the vulnerability actionable.
This report has a CVE identifier, which makes it suitable for focused search and vulnerability triage workflows.
Affected version data gives operators a concrete comparison point against installed WordPress software.
A fixed version is present, so the page can answer update and remediation intent directly.
External references are available for source validation, advisory review, and incident notes.
Use these checks when converting this record into a patch ticket, incident note, or risk acceptance decision.
Inventory the installed Plugin package and compare its version with Versions up to 1.7.16.
Confirm Booking Package is updated to 1.7.17 or newer.
Review references and CVSS vector details for exploitability, authentication requirements, and exposure path.
After patching, re-run vulnerability monitoring and keep the related plugin or theme hub under review for follow-up CVEs.
| Software Type | Plugin |
|---|---|
| Software Slug |
booking-package
View on wordpress.org
|
| CVE | CVE-2026-9851 |
| Patched Versions |
1.7.17
|
| Affected Versions |
Versions up to 1.7.16
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Booking Package <= 1.5.98 - Authorization Bypass to Arbitrary Password Reset
Booking Package <= 1.5.28 - Unauthenticated Sensitive Data Disclosure
Booking Package <= 1.6.72 - Reflected Cross-Site Scripting via Locale Parameter
Booking Package <= 1.6.01 - Reflected Cross-Site Scripting via 'mode'
Booking Package <= 1.5.10 - Reflected Cross-Site Scripting
Booking Package <= 1.7.06 - Unauthenticated Price Manipulation via 'amount' Parameter
Booking Package <= 1.7.06 - Missing Authorization
Booking Package <= 1.6.27 - Unauthenticated Price Manipulation
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