CVE-2024-54294: Firebase OTP Authentication Bypass Flaw

CVE-2024-54294 Overview

CVE-2024-54294 is an Authentication Bypass Using an Alternate Path or Channel vulnerability (CWE-288) affecting the Firebase OTP Authentication plugin for WordPress developed by Appgenix Infotech. This vulnerability allows attackers to bypass authentication mechanisms and potentially take over user accounts on affected WordPress installations.

The vulnerability exists in the authentication-via-otp-using-firebase plugin and affects all versions through 1.0.1. Attackers can exploit this flaw to circumvent the OTP (One-Time Password) verification process, gaining unauthorized access to user accounts without proper authentication.

Critical Impact

This authentication bypass vulnerability enables account takeover attacks on WordPress sites using the Firebase OTP Authentication plugin, potentially compromising user accounts and sensitive data.

Affected Products

• Firebase OTP Authentication plugin for WordPress (versions through 1.0.1)
• WordPress installations using authentication-via-otp-using-firebase plugin

Discovery Timeline

• 2024-12-13 - CVE-2024-54294 published to NVD
• 2026-04-01 - Last updated in NVD database

Technical Details for CVE-2024-54294

Vulnerability Analysis

This vulnerability falls under CWE-288 (Authentication Bypass Using an Alternate Path or Channel), which occurs when a product requires authentication but provides an alternative path or channel that does not require authentication. In the context of the Firebase OTP Authentication plugin, the intended security mechanism—OTP verification via Firebase—can be bypassed through an alternate authentication pathway.

The plugin is designed to add OTP-based authentication to WordPress sites using Firebase as the backend service. However, the implementation contains a flaw that allows attackers to authenticate without completing the OTP verification step. This type of vulnerability is particularly dangerous in authentication plugins as it directly undermines the security control the plugin is meant to provide.

Root Cause

The root cause of this vulnerability lies in improper validation of the authentication flow within the Firebase OTP Authentication plugin. The plugin fails to properly enforce the OTP verification requirement, allowing attackers to access an alternate authentication pathway that bypasses the intended security checks. This typically occurs when the server-side validation does not properly verify that all authentication steps have been completed before granting access.

Attack Vector

An attacker can exploit this vulnerability by manipulating the authentication request flow to bypass the OTP verification step. Since the authentication bypass allows direct access without proper verification, an attacker could potentially:

1. Identify WordPress sites using the vulnerable Firebase OTP Authentication plugin
2. Craft authentication requests that circumvent the OTP verification process
3. Gain unauthorized access to user accounts on the target WordPress installation
4. Perform account takeover attacks to access sensitive user data or administrative functions

The attack can be executed remotely without requiring prior authentication, making it accessible to unauthenticated attackers targeting vulnerable WordPress installations.

Detection Methods for CVE-2024-54294

Indicators of Compromise

• Unusual authentication patterns showing successful logins without corresponding OTP verification events
• Multiple login attempts from suspicious IP addresses targeting the OTP authentication endpoint
• Authentication logs showing access granted without proper OTP token validation
• Unexpected administrative or user account activity following suspicious authentication events

Detection Strategies

• Monitor WordPress authentication logs for login events that bypass the expected OTP verification flow
• Implement Web Application Firewall (WAF) rules to detect anomalous authentication requests to the Firebase OTP plugin endpoints
• Review server access logs for requests targeting the authentication-via-otp-using-firebase plugin with unusual parameters
• Deploy intrusion detection rules to identify authentication bypass attempts against OTP verification mechanisms

Monitoring Recommendations

• Enable detailed logging for all authentication events on WordPress installations using this plugin
• Set up alerts for successful authentications that do not show corresponding Firebase OTP verification requests
• Monitor for bulk authentication attempts from single IP addresses or unusual geographic locations
• Implement anomaly detection for user session creation patterns that deviate from normal OTP-authenticated flows

How to Mitigate CVE-2024-54294

Immediate Actions Required

• Identify all WordPress installations using the Firebase OTP Authentication plugin version 1.0.1 or earlier
• Consider temporarily disabling the vulnerable plugin until a security patch is available
• Implement additional authentication controls such as IP-based restrictions or additional verification steps
• Review authentication logs for signs of exploitation and investigate any suspicious activity
• Monitor the Patchstack security database for updates on available patches

Patch Information

As of the published vulnerability details, the issue affects Firebase OTP Authentication versions through 1.0.1. Administrators should monitor the plugin developer and security advisory sources for patch releases. The vulnerability has been documented in the Patchstack Vulnerability Database, which should be consulted for the latest remediation guidance.

Workarounds

• Disable the Firebase OTP Authentication plugin until a patched version is released
• Implement additional authentication layers such as standard WordPress password authentication alongside OTP
• Use a Web Application Firewall (WAF) to filter suspicious authentication requests targeting the plugin
• Restrict access to WordPress login pages using IP whitelisting where feasible
• Consider migrating to an alternative OTP authentication solution that has been verified as secure