CVE-2026-94231 Overview
CVE-2026-94231 affects the TrueBooker WordPress plugin in versions prior to 1.3.0. The plugin omits authorization checks on several functions that manage booking services and categories. Unauthenticated attackers can create and modify booking services, including their prices, over the network. The flaw is categorized as Missing Authorization [CWE-862].
The vulnerability requires no authentication, no user interaction, and low attack complexity. Exploitation does not expose confidential data or crash the service, but it does permit tampering with booking data that drives business operations.
Critical Impact
Unauthenticated remote attackers can create or modify booking services, categories, and prices on affected WordPress sites running TrueBooker before 1.3.0.
Affected Products
- TrueBooker WordPress plugin versions prior to 1.3.0
- WordPress sites with the TrueBooker plugin installed and activated
- Deployments exposing the WordPress REST or admin AJAX endpoints to the internet
Discovery Timeline
- 2026-10-19 - CVE-2026-94231 published to the National Vulnerability Database (NVD)
- 2026-10-19 - Last updated in NVD database
Technical Details for CVE-2026-94231
Vulnerability Analysis
The TrueBooker plugin exposes functionality that creates and modifies booking services and categories. The affected handlers do not verify the caller's capability or role before executing privileged operations. An unauthenticated HTTP request to these endpoints is sufficient to trigger service and category changes, including modifying prices.
Because the plugin manages customer-facing booking data, successful exploitation enables business logic abuse. Attackers can introduce rogue services, change prices to zero, or alter categories to disrupt scheduling. The impact is limited to data integrity on the booking entities exposed by the plugin.
Root Cause
The root cause is a missing authorization check [CWE-862] within the plugin's service and category management handlers. The handlers rely on request parameters rather than enforcing a current_user_can() capability check or verifying a valid nonce tied to an authenticated session. Any client that reaches the endpoint executes the privileged action.
Attack Vector
The attack vector is the network. An attacker sends crafted HTTP requests to the plugin's unauthenticated endpoints that handle booking service and category operations. No credentials, cookies, or user interaction are required. See the WPScan Vulnerability Report for technical specifics on the vulnerable endpoints.
No verified exploit code is publicly tracked for this issue. The vulnerability mechanism is described in prose because no sanitized proof-of-concept has been released by the reporter.
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Stop Identity AttacksDetection Methods for CVE-2026-94231
Indicators of Compromise
- Unexpected booking services or categories appearing in the TrueBooker administration views
- Price fields on existing services changed outside of normal administrative activity
- HTTP POST requests to TrueBooker admin-ajax or REST endpoints originating from unauthenticated sessions
- WordPress audit log entries showing service or category modifications with no associated user ID
Detection Strategies
- Review web server access logs for unauthenticated requests to TrueBooker plugin endpoints, especially those with action= parameters that reference booking services or categories
- Compare current booking service and category records against a known-good backup to identify unauthorized changes
- Enable a WordPress activity logging plugin to capture create and update events on plugin-managed data
Monitoring Recommendations
- Alert on anomalous volumes of POST requests to /wp-admin/admin-ajax.php or the plugin's REST routes
- Monitor the WordPress database tables used by TrueBooker for unexpected inserts or price updates
- Forward web server and WordPress audit logs to a centralized SIEM for correlation and retention
How to Mitigate CVE-2026-94231
Immediate Actions Required
- Upgrade the TrueBooker plugin to version 1.3.0 or later on all WordPress sites
- Audit existing booking services, categories, and prices for unauthorized modifications
- Restrict access to /wp-admin/ and the WordPress REST API to trusted networks where possible
Patch Information
The vendor addressed the missing authorization checks in TrueBooker version 1.3.0. Administrators should update through the WordPress plugin manager or by replacing the plugin files with the fixed release. Refer to the WPScan Vulnerability Report for the fixed version reference.
Workarounds
- Deactivate and remove the TrueBooker plugin until the site can be updated to version 1.3.0
- Deploy a web application firewall rule that blocks unauthenticated requests to the plugin's service and category endpoints
- Limit access to WordPress AJAX and REST endpoints via IP allowlists at the reverse proxy or firewall
# Example WP-CLI command to update the TrueBooker plugin
wp plugin update truebooker --version=1.3.0
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
