CVE-2024-54239: Eyewear Prescription Form Privilege Escalation

CVE-2024-54239 Overview

CVE-2024-54239 is a Missing Authorization vulnerability in the dugudlabs Eyewear prescription form WordPress plugin (eyewear-prescription-form) that allows attackers to perform Privilege Escalation through arbitrary option updates. This vulnerability stems from improper access control mechanisms that fail to verify user permissions before allowing modification of WordPress options.

Critical Impact

Attackers can exploit this missing authorization flaw to arbitrarily update WordPress options, potentially escalating privileges to administrator level and gaining full control of the affected WordPress installation.

Affected Products

• WordPress Eyewear prescription form plugin versions up to and including 4.0.18
• WordPress installations using the vulnerable eyewear-prescription-form plugin

Discovery Timeline

• 2024-12-13 - CVE-2024-54239 published to NVD
• 2026-04-01 - Last updated in NVD database

Technical Details for CVE-2024-54239

Vulnerability Analysis

This vulnerability is classified under CWE-862 (Missing Authorization), which occurs when a software component does not perform proper authorization checks before allowing access to sensitive functionality. In the context of the Eyewear prescription form plugin, critical functions that modify WordPress options lack adequate permission verification, allowing unauthenticated or low-privileged users to execute privileged operations.

The arbitrary option update capability is particularly dangerous in WordPress environments because WordPress options control fundamental site configurations, including user roles, site URLs, and security settings. By manipulating these options, an attacker can effectively take over the entire WordPress installation.

Root Cause

The root cause of CVE-2024-54239 is the absence of proper capability checks in the plugin's code paths that handle option updates. WordPress provides built-in functions like current_user_can() to verify user permissions before executing sensitive operations, but the vulnerable plugin fails to implement these checks appropriately.

When authorization checks are missing, any authenticated user—or potentially even unauthenticated visitors depending on the specific endpoint exposure—can invoke functions that should be restricted to administrators only.

Attack Vector

The attack exploits the missing authorization by directly accessing plugin endpoints or AJAX handlers that process option update requests. An attacker with minimal WordPress access (such as a subscriber account) can craft requests to modify arbitrary WordPress options.

A typical attack scenario involves:

1. Identifying the vulnerable plugin endpoint that handles option updates
2. Crafting a malicious request to modify the default_role option to administrator
3. Registering a new user account which will automatically receive administrator privileges
4. Using the escalated privileges to take full control of the WordPress site

The vulnerability can also be exploited to modify the siteurl or home options, potentially redirecting site traffic or enabling further attacks.

Detection Methods for CVE-2024-54239

Indicators of Compromise

• Unexpected modifications to WordPress options, particularly users_can_register, default_role, or administrative settings
• New administrator accounts appearing without legitimate creation
• Unusual AJAX requests or POST requests to the Eyewear prescription form plugin endpoints
• WordPress audit logs showing option changes by low-privileged users or unauthenticated sources

Detection Strategies

• Monitor WordPress wp_options table for unauthorized modifications, especially privilege-related options
• Review web server access logs for suspicious requests targeting /wp-admin/admin-ajax.php with plugin-specific action parameters
• Implement file integrity monitoring to detect unauthorized changes to plugin files
• Deploy a Web Application Firewall (WAF) with rules to detect option manipulation attempts

Monitoring Recommendations

• Enable WordPress audit logging plugins to track all option changes with user attribution
• Configure alerts for any modification of security-sensitive options such as default_role, users_can_register, and admin_email
• Regularly audit user accounts and permission levels to identify unauthorized privilege escalation
• Monitor for unusual plugin activity patterns that may indicate exploitation attempts

How to Mitigate CVE-2024-54239

Immediate Actions Required

• Update the Eyewear prescription form plugin to a patched version beyond 4.0.18 if available from the vendor
• If no patch is available, immediately deactivate and remove the vulnerable plugin from affected WordPress installations
• Audit all WordPress user accounts to identify and remove any unauthorized administrator accounts
• Review WordPress options for any suspicious or unauthorized modifications
• Check the site for any additional indicators of compromise before restoring normal operations

Patch Information

Administrators should check the Patchstack Vulnerability Alert for the latest patch status and remediation guidance from the plugin developer. Until a patch is released, the plugin should be disabled on production sites.

Workarounds

• Deactivate the eyewear-prescription-form plugin until a security patch is released
• Implement additional access controls at the web server level to restrict access to plugin endpoints
• Use a WordPress security plugin to add capability checks and restrict unauthorized option modifications
• Consider implementing a Web Application Firewall with WordPress-specific rulesets to filter malicious requests

# Deactivate the vulnerable plugin via WP-CLI
wp plugin deactivate eyewear-prescription-form

# Check for unauthorized administrator accounts
wp user list --role=administrator --format=table

# Review recent option changes (requires audit plugin)
wp option get default_role
wp option get users_can_register