Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in the LatePoint – Calendar Booking Plugin for WordPress. It occurs via the 'service[name]' parameter due to insufficient input sanitization and output escaping. Authenticated attackers with administrator-level access can inject malicious scripts that execute whenever a user accesses the affected page. It affects multi-site installations and installations where unfiltered_html is disabled.

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Impact Analysis

The vulnerability allows an attacker with administrator access to inject arbitrary web scripts that execute in users' browsers. This can lead to theft of sensitive information, session hijacking, or other malicious actions performed on behalf of users, potentially compromising the security and integrity of the affected WordPress sites.

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Mitigation Strategies

To mitigate this vulnerability, immediately update the LatePoint – Calendar Booking Plugin for WordPress to a version later than 5.1.94 where the issue is fixed. Additionally, review administrator-level access to ensure only trusted users have such privileges, and consider enabling unfiltered_html if it is safe to do so. For multi-site installations, extra caution should be taken as they are affected.

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