Executive Summary

[{'type': 'paragraph', 'content': 'The Greenshift animation and page builder blocks plugin for WordPress has a vulnerability due to a missing capability check in the function greenshift_app_pass_validation(). This flaw allows authenticated users with Subscriber-level access or higher to bypass proper permission checks and retrieve global plugin settings, including sensitive stored AI API keys.'}, {'type': 'paragraph', 'content': "Originally, the function validated application passwords but did not verify the user's role, allowing any user with a valid application password to access sensitive data. The fix restricts access to only administrators by checking the user's role after validating the application password."}] [1]

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Impact Analysis

This vulnerability can lead to unauthorized disclosure of sensitive plugin settings, including AI API keys, to users who should not have access. Attackers with Subscriber-level access or above can exploit this to retrieve confidential information, potentially leading to misuse of AI services or further compromise of the WordPress site.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': "This vulnerability can be detected by checking if the Greenshift plugin's function greenshift_app_pass_validation() improperly allows access to global plugin settings without verifying that the user has administrator privileges."}, {'type': 'paragraph', 'content': 'One way to detect exploitation attempts is to monitor REST API requests that invoke this function and check if users with Subscriber-level access or above are retrieving sensitive plugin settings.'}, {'type': 'paragraph', 'content': 'Since the vulnerability involves unauthorized access via application passwords, you can audit logs for REST API authentication attempts using application passwords from non-administrator users.'}, {'type': 'list_item', 'content': 'Use WordPress debug or access logs to identify REST API calls to the Greenshift plugin endpoints.'}, {'type': 'list_item', 'content': "Run commands to search web server logs for suspicious API calls, for example: `grep -i 'greenshift' /var/log/apache2/access.log` or `grep -i 'greenshift' /var/log/nginx/access.log`."}, {'type': 'list_item', 'content': 'Check WordPress user roles and application password usage with WP-CLI commands such as `wp user list --role=subscriber` to identify users who might exploit the vulnerability.'}] [1]

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Mitigation Strategies

The immediate mitigation step is to update the Greenshift – animation and page builder blocks plugin to a version later than 12.5.7 where the vulnerability is fixed.

The fix involves adding a capability check in the greenshift_app_pass_validation() function to ensure only administrators with valid application passwords can access sensitive plugin settings.

If updating immediately is not possible, restrict access to the REST API endpoints related to the Greenshift plugin to administrator users only, or disable the plugin temporarily.

• Update the plugin to the latest version containing the security patch.
• Audit and revoke any suspicious application passwords for users with Subscriber-level access or above.
• Monitor logs for unauthorized access attempts and block offending IP addresses if necessary.

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