Vulnerability Overview
Pie Register, a plugin for creating custom registration forms on WordPress, has a critical security flaw in its social login process. This flaw permits attackers to bypass authentication mechanisms, potentially logging in as any user by merely knowing their user ID or username.
Vulnerability Details
The issue lies within the social login functionality of Pie Register versions prior to 3.7.1.6. Specifically, an attacker can send a crafted POST request to the login URL with manipulated parameters (social_site=true and a user-defined user_id_social_site) to achieve unauthorized access to any user account.
Possible Effects
Successful exploitation allows an attacker to:
- Access private user information.
- Perform actions with the privileges of the compromised user, including administrative tasks.
- Potentially escalate privileges or exploit further vulnerabilities within the site.
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S4E offers a comprehensive platform to detect vulnerabilities like CVE-2021-24647, providing users with:
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References
- Immediate Update: Ensure the Pie Register plugin is updated to version 3.7.1.6 or later.
- Review Logs: Check access logs for unusual login attempts or patterns that might indicate exploitation attempts.
- Strengthen Authentication: Implement additional authentication measures such as two-factor authentication (2FA) for user accounts, especially administrators.
- Regular Audits: Perform regular security audits and scans of your WordPress site to detect and mitigate new vulnerabilities.
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