CVE-2024-47321: WP Datepicker Auth Bypass Vulnerability

CVE-2024-47321 Overview

CVE-2024-47321 is a Missing Authorization vulnerability affecting the WP Datepicker WordPress plugin developed by Fahad Mahmood. This broken access control flaw allows unauthenticated attackers to access functionality that is not properly constrained by Access Control Lists (ACLs). The vulnerability enables attackers to bypass authorization checks and interact with plugin functionality without proper permissions, potentially leading to unauthorized data access, modification, or complete site compromise.

Critical Impact

Unauthenticated attackers can bypass authorization controls to access restricted plugin functionality, potentially leading to full site compromise with high confidentiality, integrity, and availability impact.

Affected Products

• WP Datepicker plugin versions from n/a through 2.1.1
• WordPress installations running vulnerable WP Datepicker versions
• Androidbubbles WP Datepicker for WordPress

Discovery Timeline

• 2024-11-01 - CVE-2024-47321 published to NVD
• 2024-11-12 - Last updated in NVD database

Technical Details for CVE-2024-47321

Vulnerability Analysis

This vulnerability falls under CWE-862 (Missing Authorization), a critical security flaw where the application fails to perform proper authorization checks before allowing access to protected functionality. In the context of the WP Datepicker plugin, the application does not verify whether the requesting user has the necessary privileges to execute certain actions.

The missing authorization check allows any user, including unauthenticated visitors, to access and manipulate plugin functionality that should be restricted to authenticated administrators or specific user roles. This type of vulnerability is particularly dangerous in WordPress environments where plugins often handle sensitive operations such as database modifications, file uploads, or configuration changes.

Root Cause

The root cause of this vulnerability is the absence of proper capability or permission checks in the plugin's code paths. WordPress provides mechanisms such as current_user_can() and nonce verification for securing AJAX handlers and administrative functions. The WP Datepicker plugin fails to implement these security controls adequately, allowing unauthorized access to protected features.

Broken access control vulnerabilities typically occur when developers assume that hiding a feature from the user interface provides sufficient protection, rather than implementing proper server-side authorization checks on every sensitive operation.

Attack Vector

The vulnerability is exploitable remotely over the network without requiring any authentication or user interaction. An attacker can directly interact with vulnerable endpoints or functions exposed by the WP Datepicker plugin. The attack does not require special privileges, making it accessible to any remote attacker who can reach the WordPress installation.

Attackers may craft requests to vulnerable AJAX actions or plugin endpoints that lack proper authorization validation, potentially allowing them to modify plugin settings, access stored data, or perform other privileged operations that should be restricted to authenticated administrators.

Detection Methods for CVE-2024-47321

Indicators of Compromise

• Unexpected or unauthorized modifications to WP Datepicker plugin settings
• Unusual AJAX requests to WordPress admin-ajax.php targeting WP Datepicker actions
• Log entries showing unauthenticated access attempts to plugin functionality
• Unexpected changes to database tables associated with the WP Datepicker plugin

Detection Strategies

• Monitor WordPress access logs for suspicious requests to /wp-admin/admin-ajax.php with WP Datepicker-related action parameters
• Implement Web Application Firewall (WAF) rules to detect and block unauthorized access patterns
• Use WordPress security plugins to audit plugin activity and detect anomalous behavior
• Review server logs for high-volume requests from single IP addresses targeting plugin endpoints

Monitoring Recommendations

• Enable detailed logging for WordPress AJAX requests and plugin activities
• Configure alerts for failed authorization attempts or unexpected privilege escalation patterns
• Regularly audit installed plugin versions against known vulnerability databases
• Implement real-time monitoring for changes to critical WordPress configuration files and database tables

How to Mitigate CVE-2024-47321

Immediate Actions Required

• Update WP Datepicker plugin to a version newer than 2.1.1 that contains the security fix
• Temporarily deactivate the WP Datepicker plugin if an update is not immediately available
• Review WordPress access logs for any signs of exploitation
• Implement additional access controls through a Web Application Firewall

Patch Information

Organizations should update the WP Datepicker plugin to the latest available version that addresses this vulnerability. Consult the Patchstack Vulnerability Advisory for detailed information about the fix and affected versions.

If the plugin developer has not released a patched version, consider switching to an alternative datepicker plugin that is actively maintained and does not contain this vulnerability.

Workarounds

• Deactivate and remove the WP Datepicker plugin until a patched version is available
• Implement server-level access controls to restrict access to WordPress AJAX endpoints from untrusted sources
• Use a WordPress security plugin or WAF to block requests to vulnerable plugin endpoints
• Restrict access to wp-admin and admin-ajax.php to trusted IP addresses where feasible

# Apache .htaccess workaround to restrict admin-ajax.php access
# Add to WordPress root .htaccess file
<Files admin-ajax.php>
    Order deny,allow
    Deny from all
    # Allow specific trusted IPs
    Allow from 192.168.1.0/24
    Allow from your.trusted.ip.address
</Files>