Executive Summary

This vulnerability is a Cross-Site Request Forgery (CSRF) issue in the NS IE Compatibility Fixer plugin for WordPress, affecting all versions up to and including 2.1.5. It occurs because the plugin's settings update functionality lacks nonce validation, allowing an attacker to trick an administrator into performing unintended actions, such as changing plugin settings, by sending a forged request.

Useful 0 Not Useful 0

Impact Analysis

An unauthenticated attacker can exploit this vulnerability to modify the plugin's settings without authorization if they can trick an administrator into clicking a malicious link. This could lead to unauthorized changes in the website's configuration, potentially affecting site behavior or security.

Useful 0 Not Useful 0

Mitigation Strategies

To mitigate this vulnerability, update the NS IE Compatibility Fixer plugin to a version later than 2.1.5 where the nonce validation issue is fixed. Additionally, ensure that administrators are cautious about clicking on untrusted links to avoid CSRF attacks.

Useful 0 Not Useful 0

Compliance Impact

The vulnerability allows unauthenticated attackers to modify plugin settings via CSRF, potentially leading to unauthorized changes in a WordPress environment. While the provided resources do not explicitly discuss compliance with standards like GDPR or HIPAA, such unauthorized modifications could indirectly impact compliance by compromising the integrity and security of systems that handle sensitive data. Therefore, failure to address this vulnerability might increase the risk of non-compliance with regulations that require secure and authorized access controls. [1]

Useful 0 Not Useful 0

Detection Guidance

This vulnerability can be detected by checking if the NS IE Compatibility Fixer plugin version is up to and including 2.1.5 and if the plugin's settings update functionality lacks nonce validation. Since the vulnerability involves missing nonce validation allowing CSRF attacks, you can detect attempts by monitoring HTTP requests to the plugin's settings update endpoint that do not include a valid WordPress nonce parameter (_wpnonce). To manually verify nonce validation in the plugin code, you can look for the use of WordPress functions like check_admin_referer() or wp_verify_nonce() in the settings update handler. For network detection, you can use tools like curl or wget to simulate requests without a nonce or with an invalid nonce and observe if the settings are updated. Example command to test nonce validation by sending a POST request without a nonce: curl -X POST -d "setting=value" https://yourwordpresssite.com/wp-admin/admin.php?page=ns_ie_compatibility_fixer_settings. If the request succeeds without a nonce, the plugin is vulnerable. Additionally, monitoring web server logs or using a web application firewall (WAF) to detect suspicious POST requests to the plugin's settings page without valid nonce tokens can help detect exploitation attempts. [2, 3]

Useful 0 Not Useful 0