CVE-2024-12922: Altair WordPress Theme Privilege Escalation

CVE-2024-12922 Overview

The Altair theme for WordPress contains a critical authorization bypass vulnerability that enables unauthenticated attackers to escalate privileges and gain administrative access to affected WordPress installations. The vulnerability stems from a missing capability check within the functions.php file, allowing unauthorized modification of WordPress site options without proper authentication.

This flaw affects all versions of the Altair theme up to and including version 5.2.4. Attackers can exploit this vulnerability remotely to modify arbitrary WordPress options, including the default user registration role and registration settings. By changing these options, an attacker can enable user registration with administrator privileges, effectively creating a backdoor for full site compromise.

Critical Impact

Unauthenticated attackers can gain full administrative access to vulnerable WordPress sites by exploiting missing authorization checks to modify site options and create administrator accounts.

Affected Products

• Altair WordPress Theme versions up to and including 5.2.4
• WordPress installations using the vulnerable Altair theme
• Tour and Travel Agency websites running Altair theme

Discovery Timeline

• 2025-03-19 - CVE CVE-2024-12922 published to NVD
• 2025-03-19 - Last updated in NVD database

Technical Details for CVE-2024-12922

Vulnerability Analysis

This vulnerability is classified as CWE-862 (Missing Authorization), representing a fundamental access control failure in the Altair WordPress theme. The theme's functions.php file contains functionality that processes requests to modify WordPress options without verifying whether the requesting user has the appropriate capabilities or permissions to perform such actions.

WordPress implements a robust capability system where administrative actions require users to possess specific capabilities (such as manage_options). The vulnerable code in Altair theme bypasses this security model entirely by failing to call WordPress capability check functions like current_user_can() before executing sensitive operations.

The exploitation scenario is particularly dangerous because it allows complete site takeover through a two-step attack: first, the attacker modifies the default_role option to administrator, and second, they enable user registration via the users_can_register option. After these changes, the attacker simply registers a new account through the standard WordPress registration page, automatically receiving administrator privileges.

Root Cause

The root cause of this vulnerability is the absence of authorization checks in the Altair theme's functions.php file. The developers implemented functionality to update WordPress options but neglected to verify user permissions before executing these operations. This violates WordPress security best practices, which mandate that any action modifying site configuration must first validate that the current user possesses the required capabilities.

Proper implementation would require checking user authentication status and verifying the manage_options capability before allowing any option modifications. Additionally, nonce verification should be implemented to prevent CSRF attacks.

Attack Vector

The attack is network-accessible and requires no authentication, privileges, or user interaction. An attacker can craft malicious HTTP requests directly to the vulnerable WordPress installation to trigger the option modification functionality.

The attack flow involves sending specially crafted requests to the WordPress site that invoke the vulnerable function in functions.php. Without proper capability checks, the theme processes these requests regardless of authentication status. The attacker can then manipulate critical WordPress options such as default_role and users_can_register to enable administrator account creation through standard registration.

This attack can be automated and scaled to target multiple vulnerable WordPress installations simultaneously, making it particularly dangerous for sites that have not applied the necessary updates.

Detection Methods for CVE-2024-12922

Indicators of Compromise

• Unexpected changes to the default_role WordPress option, particularly if set to administrator
• Modification of users_can_register option to enable public registration without administrator action
• Creation of new administrator accounts not authorized by site administrators
• Unusual HTTP requests targeting Altair theme endpoints in functions.php
• Unexplained changes to WordPress site options visible in the database wp_options table

Detection Strategies

• Monitor WordPress wp_options table for unauthorized modifications to default_role and users_can_register settings
• Implement web application firewall (WAF) rules to detect and block suspicious requests to theme-specific endpoints
• Review WordPress user accounts regularly for unauthorized administrator-level users
• Enable detailed logging of all WordPress option changes using security plugins
• Deploy file integrity monitoring on theme files, particularly functions.php

Monitoring Recommendations

• Configure alerts for any changes to critical WordPress options related to user registration and roles
• Implement real-time monitoring of new user account creation, especially those with elevated privileges
• Use SentinelOne Singularity XDR to monitor endpoint activity for signs of web shell deployment or post-exploitation activity
• Establish baseline WordPress configurations and alert on deviations from expected settings
• Monitor web server access logs for patterns consistent with automated exploitation attempts

How to Mitigate CVE-2024-12922

Immediate Actions Required

• Update the Altair WordPress theme to the latest patched version immediately
• Audit current WordPress user accounts and remove any unauthorized administrator accounts
• Verify that default_role is set to an appropriate non-administrative role (typically subscriber)
• Confirm that users_can_register matches your intended site configuration
• Review WordPress options table for any other unexpected modifications

Patch Information

A security update addressing this vulnerability is available for the Altair theme. Administrators should update to a version newer than 5.2.4 through their ThemeForest account. The changelog should be reviewed for specific patch details.

For additional technical details and ongoing threat intelligence, refer to the Wordfence Vulnerability Report.

Workarounds

• Temporarily disable the Altair theme and switch to a default WordPress theme until patching is possible
• Implement WAF rules to block requests to vulnerable Altair theme endpoints
• Disable public user registration at the WordPress level if not required for site functionality
• Restrict access to WordPress administrative functions via IP allowlisting at the web server level
• Consider implementing additional authentication layers such as HTTP Basic Authentication for wp-admin access

# WordPress configuration hardening example
# Add to wp-config.php to disable file editing from admin panel
define('DISALLOW_FILE_EDIT', true);

# Verify and reset default user role via WP-CLI
wp option get default_role
wp option update default_role subscriber

# Check user registration status
wp option get users_can_register

# List all administrator accounts for review
wp user list --role=administrator --fields=ID,user_login,user_email,user_registered