Blind SSRF in LearnPress WordPress Plugin

Executive Summary

This is a Server-Side Request Forgery (SSRF) vulnerability in the LearnPress WordPress plugin before version 4.4.4. It allows users with the instructor role to trick the server into making requests to arbitrary external hosts by supplying a URL without proper validation. The attack is blind and bounded, meaning the attacker cannot see the response but can still force the server to interact with unintended destinations.

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Detection Guidance

Check the installed version of the LearnPress plugin. If it is below 4.4.4, the system is vulnerable. Use WordPress admin panel or run: wp plugin list --name=learnpress in the WordPress directory.

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Impact Analysis

If you are a user with the instructor role on a vulnerable LearnPress site, an attacker could exploit this to make the server send requests to internal or external systems. This could lead to unauthorized access, data leakage, or further attacks against other systems. The impact is limited by the blind nature of the SSRF, but it still poses a security risk.

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Compliance Impact

This vulnerability could potentially violate compliance requirements such as GDPR or HIPAA by allowing unauthorized data access or exposure through server-side interactions. Organizations using LearnPress must ensure they update to version 4.4.4 or later to mitigate this risk and maintain compliance.

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Mitigation Strategies

Update the LearnPress plugin to version 4.4.4 or later immediately. Remove or restrict access for users with the instructor role until the update is applied.

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