CVE-2022-40671 in WP Rating System Plugin
Summary
by MITRE • 09/23/2022
Cross-Site Request Forgery (CSRF) vulnerability in Rate my Post – WP Rating System plugin <= 3.3.4 at WordPress.
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Analysis
by VulDB Data Team • 09/23/2022
The CVE-2022-40671 vulnerability represents a critical cross-site request forgery flaw discovered in the Rate my Post - WP Rating System WordPress plugin version 3.3.4 and earlier. This vulnerability exposes WordPress sites to unauthorized actions that can be executed by malicious actors without user consent. The issue stems from the plugin's inadequate validation of HTTP request origins, allowing attackers to craft malicious requests that appear to originate from legitimate administrative sessions. The vulnerability specifically affects the plugin's rating submission functionality, where an authenticated user's session token could be exploited to manipulate post ratings without their knowledge or explicit authorization.
The technical implementation of this CSRF vulnerability occurs at the HTTP request level where the plugin fails to implement proper anti-CSRF tokens or origin validation mechanisms. When a user accesses the WordPress admin interface and subsequently navigates to a malicious site or receives a crafted email with embedded requests, the attacker can leverage the user's authenticated session to perform unauthorized rating modifications. The vulnerability operates under CWE-352 which categorizes cross-site request forgery flaws as a fundamental web application security weakness. This particular implementation allows attackers to manipulate the rating system through forged requests that bypass standard WordPress authentication checks, potentially leading to data integrity compromises and reputational damage for affected sites.
The operational impact of this vulnerability extends beyond simple rating manipulation to encompass potential broader system compromise and data corruption. An attacker could exploit this weakness to flood posts with spam ratings, manipulate review scores to influence user perception, or potentially disrupt the plugin's functionality entirely. The vulnerability affects WordPress sites using the Rate my Post plugin with versions up to 3.3.4, making it a widespread concern for numerous websites that rely on this rating functionality. According to ATT&CK framework category T1566, this vulnerability represents a method of initial access through social engineering or malicious website exploitation, where users are tricked into performing unintended actions. The impact is particularly concerning for sites that depend heavily on user-generated ratings for business operations, as it could lead to significant reputational harm and loss of trust.
Mitigation strategies for CVE-2022-40671 require immediate plugin updates to version 3.3.5 or later, which contain the necessary CSRF protection mechanisms. Administrators should also implement additional security measures including the use of anti-CSRF tokens in all forms, proper origin validation for AJAX requests, and regular security audits of WordPress plugins. Network-level protections such as web application firewalls can provide additional layers of defense against exploitation attempts. Security teams should monitor for suspicious rating patterns and implement automated systems to detect unusual rating activity that may indicate exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date WordPress plugins and following security best practices including regular vulnerability assessments and security monitoring. Organizations should also consider implementing Content Security Policy headers and ensuring that all user interactions with web applications include proper authentication verification mechanisms to prevent similar CSRF vulnerabilities from affecting their systems.