CVE-2025-7665: WordPress OTP Verification Privilege Escalation

CVE-2025-7665 Overview

The Miniorange OTP Verification with Firebase plugin for WordPress contains a critical privilege escalation vulnerability due to a missing capability check on the handle_mofirebase_form_options function. This security flaw affects versions 3.1.0 through 3.6.2 and allows unauthenticated attackers to escalate privileges by modifying the default user role to Administrator. The vulnerability is exploitable when premium features are enabled on the WordPress installation.

Critical Impact

Unauthenticated attackers can gain full administrative access to WordPress sites by exploiting a missing authorization check, potentially leading to complete site takeover.

Affected Products

• Miniorange OTP Verification with Firebase plugin versions 3.1.0 to 3.6.2
• WordPress installations with premium features enabled

Discovery Timeline

• 2025-09-19 - CVE-2025-7665 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-7665

Vulnerability Analysis

This vulnerability is classified under CWE-862 (Missing Authorization), representing a fundamental access control weakness in the affected WordPress plugin. The handle_mofirebase_form_options function fails to implement proper capability checks before allowing modifications to critical site configuration settings, specifically the default user role assignment.

When an attacker exploits this vulnerability, they can manipulate the default registration role to "Administrator," enabling any new user registration to automatically receive full administrative privileges. This attack path requires no prior authentication, making it particularly dangerous for publicly accessible WordPress installations with the vulnerable plugin enabled.

The exploitation requirement that premium features must be enabled narrows the attack surface somewhat, but organizations utilizing the premium tier of this plugin face significant risk. Successful exploitation grants attackers complete control over the WordPress installation, including the ability to install backdoors, modify content, access sensitive data, and pivot to other connected systems.

Root Cause

The root cause is the absence of proper authorization verification in the handle_mofirebase_form_options function within the plugin's form handling code. WordPress plugins should utilize capability checks such as current_user_can() to verify that the requesting user has appropriate permissions before processing sensitive configuration changes. The missing capability check allows any user, including unauthenticated visitors, to invoke this function and modify the default user role setting.

Attack Vector

The attack is network-based and can be executed remotely without requiring any authentication or user interaction. An attacker sends a crafted HTTP request to the WordPress installation targeting the vulnerable function endpoint. The request manipulates form options to set the default user role to Administrator. Once the default role is changed, the attacker can register a new account and immediately gain administrative access to the WordPress site.

The attack methodology involves:

1. Identifying a WordPress site running a vulnerable version of the Miniorange OTP Verification with Firebase plugin
2. Crafting a request to the handle_mofirebase_form_options function endpoint
3. Modifying the default role parameter to Administrator
4. Registering a new user account on the site
5. Gaining immediate administrative privileges through the modified default role

For technical details on the vulnerable code path, refer to the WordPress Plugin Code Review.

Detection Methods for CVE-2025-7665

Indicators of Compromise

• Unexpected changes to the WordPress default user role setting in the database
• New user accounts with Administrator privileges that were not created by authorized personnel
• HTTP requests targeting plugin endpoints associated with handle_mofirebase_form_options
• Unusual POST requests to WordPress plugin handler URLs from external IP addresses
• Modified wp_options entries related to default role configuration

Detection Strategies

• Monitor WordPress audit logs for unauthorized modifications to user role settings
• Implement web application firewall (WAF) rules to detect and block requests targeting known vulnerable plugin endpoints
• Review access logs for POST requests to /wp-admin/admin-ajax.php with suspicious action parameters related to the Miniorange plugin
• Deploy file integrity monitoring to detect unauthorized changes to plugin files

Monitoring Recommendations

• Enable detailed logging for WordPress user registration and role assignment events
• Configure alerts for any changes to the default user role WordPress setting
• Monitor for new Administrator accounts created outside normal administrative workflows
• Implement real-time alerting on WAF rule triggers related to privilege escalation attempts

How to Mitigate CVE-2025-7665

Immediate Actions Required

• Update the Miniorange OTP Verification with Firebase plugin to version 3.6.3 or later immediately
• Audit all existing Administrator accounts for unauthorized additions
• Review recent user registrations and remove any suspicious accounts
• Verify the default user role setting has not been modified (should typically be "Subscriber")
• Temporarily disable the plugin if updates cannot be applied immediately

Patch Information

A security patch addressing this vulnerability is available. Organizations should update to version 3.6.3 or later of the Miniorange OTP Verification with Firebase plugin. The patch implements proper capability checks in the handle_mofirebase_form_options function to ensure only authorized users can modify critical configuration settings.

For detailed vulnerability information, refer to the Wordfence Vulnerability Report.

Workarounds

• Disable the Miniorange OTP Verification with Firebase plugin until the patch can be applied
• Disable premium features in the plugin configuration if immediate patching is not possible
• Implement WAF rules to block unauthorized requests to the vulnerable function endpoint
• Restrict user registration on the WordPress site until the vulnerability is addressed
• Add server-level access controls to limit plugin endpoint access to authenticated administrators only

# WordPress wp-config.php - Disable user registration temporarily
define('WP_ALLOW_MULTISITE', false);
# Add to wp-config.php to disable open registration
# Set through WordPress Admin: Settings > General > Membership (uncheck "Anyone can register")