Divi Theme Server-Side Request Forgery Vulnerability

Executive Summary

This is a blind Server-Side Request Forgery (SSRF) vulnerability in the Divi WordPress theme up to version 4.27.6. It occurs because the et_pb_set_video_oembed_thumbnail_resolution() function uses wp_remote_get() instead of wp_safe_remote_get() to fetch remote images. This allows authenticated attackers with Contributor-level access or higher to make web requests to arbitrary locations from the server. The attack is blind as the response body is not returned, but attackers can infer success via status or timing differences.

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Detection Guidance

This vulnerability can be detected by checking if your Divi theme version is 4.27.6 or earlier. Use WordPress admin to check the theme version or run the command 'wp theme list' in your WordPress directory if you have WP-CLI installed.

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Impact Analysis

• Authenticated attackers with Contributor access or higher could exploit this to probe internal networks or services from your server.
• The vulnerability enables reconnaissance of internal systems without direct access to responses.
• While not directly stealing data, it could be used as a stepping stone for further attacks against your infrastructure.

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Compliance Impact

This SSRF vulnerability could potentially violate compliance requirements that mandate strict access controls and data protection measures, such as GDPR's principle of data protection by design or HIPAA's security rule requiring protection against unauthorized access. Exploitation could indicate inadequate security controls in the environment.

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Mitigation Strategies

Immediately update the Divi theme to version 4.27.7 or later, which patches this SSRF vulnerability. You can update via WordPress admin panel or WP-CLI using 'wp theme update divi'.

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