CVE-2025-4966 in WP Online Users Stats Plugin
Summary
by MITRE • 06/06/2025
The WP Online Users Stats plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.0. This is due to missing nonce validation within the hk_dataset_results() function. This makes it possible for unauthenticated attackers to inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
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Analysis
by VulDB Data Team • 06/06/2025
The WP Online Users Stats plugin for WordPress presents a critical cross-site request forgery vulnerability that affects all versions up to and including 1.0.0. This vulnerability stems from inadequate input validation mechanisms within the plugin's hk_dataset_results() function, which fails to implement proper nonce verification for critical administrative operations. The absence of nonce validation creates a fundamental security gap that allows unauthenticated attackers to exploit the plugin's functionality without proper authentication. This flaw specifically targets the plugin's data handling capabilities, where malicious actors can craft forged requests that appear legitimate to the WordPress administration interface. The vulnerability operates under the principle that administrators may be tricked into performing unintended actions through social engineering techniques such as phishing emails or compromised websites. When an administrator clicks on a malicious link or visits a compromised page, the forged request can execute with the administrator's privileges, potentially leading to unauthorized modifications of user data or system configurations. The technical nature of this vulnerability aligns with CWE-352, which defines cross-site request forgery as a weakness where the application fails to validate that requests originate from legitimate sources. This weakness allows attackers to perform unauthorized actions on behalf of authenticated users, making it particularly dangerous in administrative contexts where elevated privileges exist.
The operational impact of this vulnerability extends beyond simple data manipulation to encompass potential system compromise and unauthorized access to sensitive user information. Attackers can exploit this weakness to inject malicious web scripts that may persist in the plugin's data storage or execution environment, potentially creating backdoors or facilitating further attacks. The vulnerability's exploitation requires minimal technical skill from attackers, as it relies on social engineering rather than complex technical exploits, making it particularly dangerous in environments where administrators may not be adequately trained in recognizing phishing attempts. When an administrator inadvertently triggers the forged request, the malicious code can execute within the context of the administrator's session, potentially allowing attackers to access sensitive data, modify plugin configurations, or even escalate privileges within the WordPress environment. The attack vector is particularly insidious because it can be delivered through various means including email campaigns, compromised third-party websites, or even within legitimate administrative interfaces if proper validation is not implemented. The vulnerability affects the core integrity of the WordPress plugin ecosystem by demonstrating how seemingly minor validation oversights can create significant security risks.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security improvements within the WordPress plugin architecture. The most direct solution involves implementing proper nonce validation within the hk_dataset_results() function, ensuring that all administrative operations require valid cryptographic tokens that verify the authenticity of requests. Security practitioners should immediately update to the latest version of the plugin once a patched release becomes available, as the vulnerability affects all versions up to 1.0.0. Organizations should also implement additional defensive measures including monitoring for suspicious administrative activities, implementing web application firewalls to detect and block forged requests, and conducting regular security audits of installed plugins. The vulnerability highlights the importance of the principle of least privilege and proper input validation, both of which are fundamental concepts in the OWASP Top Ten security framework. Administrators should be trained to recognize potential phishing attempts and understand the risks associated with clicking on untrusted links, particularly those that may trigger administrative functions. Additionally, security teams should consider implementing automated scanning tools that can detect such vulnerabilities in plugin installations and provide alerts when nonce validation is missing from critical functions. The ATT&CK framework categorizes this vulnerability under privilege escalation and command and control techniques, emphasizing the need for comprehensive security measures that address both the technical flaw and the human factors that enable exploitation. Organizations must also consider implementing proper access controls and session management mechanisms to limit the damage that could result from successful exploitation of this vulnerability.