Executive Summary

CVE-2025-7955 is a critical authentication bypass vulnerability in the RingCentral Communications WordPress plugin versions 1.5 through 1.6.8. The vulnerability arises from improper handling of the two-factor authentication (2FA) code during login. Instead of securely storing the 2FA code on the server side (such as in PHP sessions or user meta data), the plugin compares two POST parameters submitted by the client, which are fully controllable by an attacker. This flaw allows an unauthenticated attacker to bypass 2FA and log in as any user by supplying identical bogus codes. The issue was fixed in version 1.7.0 by properly persisting and validating the 2FA code on the server side. [1]

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Impact Analysis

This vulnerability can have severe impacts as it allows unauthenticated attackers to bypass two-factor authentication and log in as any user on a WordPress site using the vulnerable RingCentral Communications plugin. This can lead to full compromise of user accounts, including administrative accounts, resulting in unauthorized access, data theft, site defacement, or further exploitation of the website. Given the high CVSS score (9.8), the impact includes complete confidentiality, integrity, and availability loss. [1]

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Detection Guidance

This vulnerability can be detected by identifying if the RingCentral Communications WordPress plugin is installed and running a vulnerable version between 1.5 and 1.6.8. Since the vulnerability involves improper 2FA validation, you can check the plugin version via WordPress CLI commands such as `wp plugin list` to see the installed version of the ringcentral plugin. Additionally, monitoring HTTP POST requests to the login endpoint for suspicious identical 2FA code parameters could indicate exploitation attempts. However, no specific detection commands or network signatures are provided in the available resources. [1, 2]

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Mitigation Strategies

The immediate mitigation step is to update the RingCentral Communications WordPress plugin to version 1.7.0 or later, where the vulnerability is fixed by properly persisting and validating the 2FA code on the server side. Until the update is applied, consider disabling the plugin or its 2FA feature to prevent exploitation. Also, review and restrict access to the WordPress admin login to trusted IPs if possible, and monitor login attempts for suspicious activity. [1, 2]

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