CVE-2026-40774 Overview
CVE-2026-40774 is a broken access control vulnerability affecting the Booking Package plugin for WordPress in versions 1.7.06 and earlier. The flaw allows unauthenticated remote attackers to invoke plugin functions without proper authorization checks. According to the Patchstack Vulnerability Report, the underlying weakness is classified as [CWE-862] Missing Authorization. The vulnerability impacts data integrity on affected WordPress installations without requiring user interaction or credentials.
Critical Impact
Unauthenticated attackers can reach restricted plugin functionality over the network, modifying booking-related data on vulnerable WordPress sites.
Affected Products
- WordPress Booking Package plugin versions <= 1.7.06
- WordPress sites with the Booking Package plugin installed and active
- Any hosting environment exposing affected plugin endpoints to the public internet
Discovery Timeline
- 2026-06-15 - CVE-2026-40774 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-40774
Vulnerability Analysis
The Booking Package plugin exposes one or more action handlers that lack capability or nonce verification. An attacker reaches these handlers directly over HTTP without authenticating to WordPress. Because authorization checks are missing, the server executes privileged plugin actions on behalf of an anonymous request.
The weakness maps to [CWE-862] Missing Authorization. Functions that should be gated by current_user_can() checks or nonce validation accept requests from any caller. This pattern is common in WordPress plugins that register AJAX or REST endpoints without enforcing role-based access control.
The primary impact is to integrity, allowing manipulation of booking data, configuration, or related plugin state. Confidentiality and availability are not directly affected per the published CVSS vector.
Root Cause
The root cause is missing authorization on plugin entry points in Booking Package <= 1.7.06. Action handlers do not verify the caller's WordPress capability or validate a nonce before performing state-changing operations.
Attack Vector
The attack is performed remotely over the network with low complexity and no privileges required. An attacker sends a crafted HTTP request to the vulnerable plugin endpoint on the target WordPress site. The plugin processes the request and performs the privileged action without verifying the requester.
No authenticated public proof-of-concept code is referenced in the enriched data. Refer to the Patchstack Vulnerability Report for technical details.
Detection Methods for CVE-2026-40774
Indicators of Compromise
- Unexpected modifications to booking records, calendars, or plugin settings in the WordPress database
- HTTP requests to admin-ajax.php or REST routes registered by the Booking Package plugin originating from unauthenticated sessions
- Anomalous POST traffic targeting Booking Package action parameters from external IP addresses
Detection Strategies
- Inventory WordPress sites and identify installations running Booking Package <= 1.7.06
- Review web server access logs for requests to plugin endpoints lacking a valid authentication cookie
- Correlate plugin endpoint access with subsequent database write activity to detect unauthorized state changes
Monitoring Recommendations
- Forward WordPress and web server logs to a centralized log platform for retention and query
- Alert on spikes in requests to plugin AJAX or REST endpoints from unauthenticated sources
- Monitor changes to booking-related tables and configuration options for unexpected writes
How to Mitigate CVE-2026-40774
Immediate Actions Required
- Update the Booking Package plugin to a version newer than 1.7.06 once the vendor publishes a fix
- Audit existing booking data and plugin configuration for unauthorized modifications
- Restrict access to WordPress administrative and AJAX endpoints behind a web application firewall
Patch Information
Consult the Patchstack Vulnerability Report for the current fixed version and remediation status. Apply the vendor-supplied update through the WordPress plugin manager or via WP-CLI as soon as it becomes available.
Workarounds
- Disable or uninstall the Booking Package plugin until a patched version is deployed
- Apply web application firewall rules that block unauthenticated requests to vulnerable plugin endpoints
- Limit network exposure of the WordPress admin interface to trusted IP ranges where feasible
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
