Executive Summary

This vulnerability is a Cross-Site Request Forgery (CSRF) issue in the Nextend Social Login and Register plugin for WordPress, affecting all versions up to 3.1.21. It occurs because the 'unlinkUser' function lacks proper nonce validation, allowing an attacker to trick a site administrator into performing an unwanted action, such as unlinking their social login, by sending a forged request.

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Impact Analysis

An attacker can exploit this vulnerability to unlink a user's social login without their consent by tricking a site administrator into clicking a malicious link. This could disrupt user access or cause inconvenience, but it does not lead to data disclosure or system compromise.

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Mitigation Strategies

To mitigate this vulnerability, update the Nextend Social Login and Register plugin for WordPress to a version later than 3.1.21 where the nonce validation issue on the 'unlinkUser' function is fixed. Additionally, avoid clicking on suspicious links and ensure site administrators are aware of the risk of Cross-Site Request Forgery attacks.

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