CVE-2024-22298: Amelia Booking Auth Bypass Vulnerability

CVE-2024-22298 Overview

CVE-2024-22298 is a Missing Authorization vulnerability affecting the TMS Amelia WordPress booking plugin (ameliabooking). This broken access control flaw allows unauthenticated attackers to bypass authorization checks and access restricted functionality within the plugin. The vulnerability stems from CWE-862 (Missing Authorization), indicating that the application fails to perform proper authorization checks before allowing access to protected resources or actions.

Critical Impact

This vulnerability enables unauthenticated remote attackers to bypass access controls in the Amelia booking plugin, potentially leading to unauthorized data access, modification of booking records, and complete compromise of the booking system's confidentiality, integrity, and availability.

Affected Products

• TMS-Outsource Amelia WordPress Plugin versions up to and including 1.0.98
• WordPress installations running vulnerable Amelia (ameliabooking) plugin versions
• All Amelia plugin deployments from initial release through version 1.0.98

Discovery Timeline

• 2024-06-10 - CVE-2024-22298 published to NVD
• 2025-03-20 - Last updated in NVD database

Technical Details for CVE-2024-22298

Vulnerability Analysis

This Missing Authorization vulnerability in the TMS Amelia booking plugin represents a fundamental access control failure where the application does not properly verify whether a user has the necessary permissions before granting access to protected functionality. The vulnerability is network-exploitable without requiring any authentication or user interaction, making it particularly dangerous for public-facing WordPress sites.

The broken access control allows attackers to interact with the booking system in ways that should be restricted to authenticated administrators or authorized users. This could include viewing sensitive customer booking information, modifying or canceling reservations, accessing administrative functions, or manipulating the plugin's configuration settings.

Root Cause

The root cause of CVE-2024-22298 is the absence of proper authorization checks within the Amelia plugin's request handling logic. When processing certain requests, the plugin fails to validate that the requesting user has appropriate permissions to perform the requested action. This is a classic example of CWE-862 (Missing Authorization), where the software does not perform an authorization check when an actor attempts to access a resource or perform an action.

In WordPress plugin development, this typically occurs when AJAX endpoints or REST API routes are registered without proper capability checks using functions like current_user_can() or nonce verification. The plugin accepts and processes requests from any source without verifying the requestor's identity or authorization level.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no authentication, no user interaction, and presenting low attack complexity. An attacker can exploit this vulnerability by sending crafted HTTP requests directly to the vulnerable plugin endpoints.

The exploitation process involves identifying the vulnerable endpoints within the Amelia plugin and sending requests that bypass the missing authorization checks. Since no authentication is required, attackers can target any WordPress site running a vulnerable version of the plugin from anywhere on the internet.

Successful exploitation could allow an attacker to access sensitive booking data including customer names, contact information, and appointment details. Additionally, attackers may be able to manipulate booking records, change plugin settings, or potentially escalate their access within the WordPress installation.

Detection Methods for CVE-2024-22298

Indicators of Compromise

• Unusual or unauthorized access to Amelia plugin AJAX endpoints from unknown IP addresses
• Unexpected modifications to booking records or plugin configuration settings
• Web server logs showing repeated requests to ameliabooking endpoints without associated authentication events
• Anomalous patterns of data retrieval from the booking database tables

Detection Strategies

• Monitor WordPress web application logs for suspicious requests targeting the /wp-admin/admin-ajax.php endpoint with Amelia-related actions
• Implement Web Application Firewall (WAF) rules to detect and block unauthorized access attempts to booking plugin functionality
• Review database audit logs for unexpected queries or modifications to Amelia-related tables
• Deploy intrusion detection signatures for broken access control exploitation patterns

Monitoring Recommendations

• Enable detailed WordPress access logging and regularly review logs for anomalous activity
• Implement real-time alerting for unauthorized access attempts to administrative plugin functions
• Monitor for unusual patterns of API calls or data access that could indicate exploitation
• Establish baseline behavior metrics for the Amelia plugin and alert on significant deviations

How to Mitigate CVE-2024-22298

Immediate Actions Required

• Update the TMS Amelia plugin to the latest available version that addresses this vulnerability
• Audit WordPress installations for vulnerable versions of the ameliabooking plugin
• Review server and application logs for any indicators of prior exploitation
• Consider temporarily disabling the Amelia plugin if an immediate update is not possible

Patch Information

Organizations should update the TMS Amelia WordPress plugin to a version newer than 1.0.98 that contains the security fix for this authorization bypass vulnerability. The patch should implement proper authorization checks on all protected endpoints to ensure that only authenticated and authorized users can access restricted functionality.

For detailed information about this vulnerability and the specific fix, refer to the Patchstack Vulnerability Report.

Workarounds

• Implement additional access controls at the web server or WAF level to restrict access to Amelia plugin endpoints
• Use WordPress security plugins to add extra authorization layers and monitor for suspicious activity
• Restrict network access to the WordPress admin area and plugin endpoints to trusted IP addresses where feasible
• Consider deploying a virtual patching solution through your WAF until an official update can be applied

# WordPress CLI command to check and update the Amelia plugin
wp plugin list --name=ameliabooking --fields=name,version,update_version

# Update the plugin to the latest version
wp plugin update ameliabooking

# Verify the update was successful
wp plugin get ameliabooking --field=version