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**Name of the Vulnerable Software and Affected Versions** Calendarinho versions prior to commit 15b2393 **Description** An Open Redirect issue occurs when the application redirects users to external URLs without proper validation, potentially leading to phishing attacks and information theft. This can cause reputational damage to the website used for redirection. **Recommendations** Update to a commit after 15b2393 to resolve the issue. As a temporary workaround, consider restricting access to external URLs to minimize the risk of exploitation.