Authenticated Role Escalation in Koinonia Link WordPress Plugin

Executive Summary

This vulnerability is a privilege escalation flaw in the Koinonia Link WordPress plugin versions 1.1.2 to 1.1.4. It allows any authenticated user, including those with a Subscriber role, to grant themselves the Administrator role by exploiting an improper role change check during profile updates. The plugin fails to verify if a user is authorized to modify roles before saving role selections.

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Detection Guidance

Check if the Koinonia Link WordPress plugin version is between 1.1.2 and 1.1.4. Log in as a low-privilege user and attempt to change your role to Administrator via profile update. If successful, the plugin is vulnerable.

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Impact Analysis

This vulnerability allows attackers to gain full control of a WordPress site by escalating their privileges to Administrator. Once an attacker has Administrator access, they can install malicious plugins, modify site content, steal sensitive data, or take over the entire website.

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Mitigation Strategies

Update the Koinonia Link plugin to version 1.1.5 or later immediately. If updating is not possible, consider disabling the plugin until a patch is applied.

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