CVE-2022-3477 in tagDiv Composer Plugin
Summary
by MITRE • 11/14/2022
The tagDiv Composer WordPress plugin before 3.5, required by the Newspaper WordPress theme before 12.1 and Newsmag WordPress theme before 5.2.2, does not properly implement the Facebook login feature, allowing unauthenticated attackers to login as any user by just knowing their email address
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Analysis
by VulDB Data Team • 05/01/2025
The vulnerability identified as CVE-2022-3477 represents a critical authentication flaw within the tagDiv Composer WordPress plugin ecosystem, affecting versions prior to 3.5. This issue specifically impacts the Facebook login implementation within the plugin's functionality, creating a significant security risk for WordPress sites utilizing the Newspaper theme version 12.0 and below, as well as the Newsmag theme version 5.2.1 and earlier. The flaw stems from insufficient validation mechanisms during the Facebook authentication process, allowing unauthorized actors to exploit the system's trust model. The vulnerability manifests when attackers can leverage known email addresses to assume the identity of legitimate users without requiring valid credentials or authentication tokens. This represents a fundamental breakdown in the plugin's security architecture, as it fails to properly verify user identities during the login process. The issue falls under CWE-287 which specifically addresses improper authentication mechanisms, and aligns with ATT&CK technique T1078.004 for valid accounts, as attackers can effectively use stolen or guessed email addresses to gain unauthorized access to user accounts.
The technical implementation of this vulnerability occurs within the plugin's Facebook login handler where the system does not adequately validate the authenticity of the Facebook authentication response. When users attempt to log in via Facebook, the plugin accepts the email address provided by the Facebook API without proper verification of the associated Facebook account. This allows attackers to simply submit any valid email address that exists in the WordPress user database, and the system will authenticate them as that user without requiring Facebook authentication proof. The flaw exists in the session management and user identification logic where the plugin relies solely on email address matching rather than implementing proper OAuth token validation or Facebook account verification. This creates a privilege escalation vector where unauthenticated attackers can gain access to user accounts, potentially leading to full site compromise. The vulnerability demonstrates a clear lack of input sanitization and authentication verification, as the system accepts Facebook-provided email addresses without confirming their association with legitimate Facebook accounts.
The operational impact of this vulnerability extends beyond simple unauthorized access, creating potential for significant data breaches and account takeovers within WordPress environments. Attackers can exploit this flaw to access user accounts with varying privilege levels, potentially including administrator accounts if they can guess or obtain email addresses of privileged users. The vulnerability enables social engineering attacks where attackers can target specific individuals by simply knowing their email addresses, making it particularly dangerous in environments where user email addresses are publicly available or easily discoverable. This issue affects not just individual user accounts but also the overall security posture of WordPress sites, as compromised user accounts can serve as entry points for further attacks including data exfiltration, malware deployment, and site defacement. The vulnerability undermines the trust model of the WordPress ecosystem, where users expect that Facebook authentication provides a secure method of account access, and demonstrates how third-party plugin integrations can create unexpected security weaknesses.
Mitigation strategies for CVE-2022-3477 require immediate action to upgrade affected systems to patched versions of the tagDiv Composer plugin, specifically version 3.5 or later, along with corresponding updates to the Newspaper and Newsmag themes. Organizations should implement comprehensive patch management procedures to ensure all WordPress components are updated regularly, particularly third-party plugins that handle authentication flows. Security teams should conduct thorough audits of all WordPress installations to identify potentially affected plugins and themes, and implement monitoring for suspicious login activities that could indicate exploitation attempts. The recommended approach includes verifying that Facebook authentication responses are properly validated through OAuth token verification rather than relying solely on email address matching. Additionally, administrators should consider implementing additional authentication layers such as two-factor authentication for critical accounts and establishing automated monitoring systems to detect unusual authentication patterns. Organizations should also review their plugin selection criteria to ensure third-party components undergo proper security assessment before deployment, as this vulnerability highlights the importance of secure authentication implementation in WordPress plugin development. The fix addresses the core issue by implementing proper verification of Facebook authentication tokens and ensuring that email address associations with Facebook accounts are validated through the official Facebook API rather than accepting unverified data from external authentication providers.