Authentication Bypass Vulnerability in All-in-One Microsoft 365 & Entra ID Plugin for WordPress

CVE-2026-2628

What is CVE-2026-2628?

CVE-2026-2628 is a notable vulnerability found in the All-in-One Microsoft 365 & Entra ID Plugin for WordPress, affecting all versions up to and including 2.2.5. This plugin is designed to integrate Microsoft 365 and Entra ID (formerly Azure AD) functionalities into WordPress websites, facilitating single sign-on (SSO) capabilities and improving user management. The vulnerability is classified as an authentication bypass, which enables unauthenticated attackers to circumvent the login mechanisms and gain access to the system as if they were authenticated users, including administrative accounts.

The implications of this vulnerability are severe, as it compromises the fundamental security of any WordPress site utilizing this plugin. Attackers can exploit this flaw to manipulate site content, access sensitive user data, or execute administrative functions without proper authorization, essentially undermining the integrity of the website and putting user information at risk.

Potential impact of CVE-2026-2628

1. Unauthorized Access: The most immediate and concerning impact is the ability for attackers to gain unauthorized access to user accounts and administrative functionalities. This can lead to data theft, fraudulent activities, and alteration of website content.

2. Data Breaches: If exploited, the vulnerability may expose sensitive data stored within the WordPress site, including personal information of users and potentially financial data, leading to significant privacy violations and regulatory penalties.

3. System Integrity Compromise: The exploitation of this vulnerability can allow attackers to modify or delete critical system files and configurations, jeopardizing the overall integrity and availability of the website. This may result in service disruption and damage to an organization's reputation.

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