PHPJabbers Event Booking Calendar Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in PHPJabbers Event Booking Calendar version 4.0. This issue allows attackers to inject malicious scripts into parameters such as 'name', 'plugin_sms_api_key', 'plugin_sms_country_code', 'title', and 'calendar_id'. The injected scripts are permanently stored on the server and executed when other users access the compromised content.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the affected content.

Reproduction

To reproduce this vulnerability, log into the application and navigate to the SMS Settings under the System Menu. Inject a script payload into the 'SMS API Key' or 'Default Country Code' fields and save the changes. The injected script will execute, demonstrating the cross-site scripting vulnerability.