CVE-2026-53591 FreeScout Vulnerable to Unauthenticated Conversation Thread Injection via HMAC Length Bypass in FetchEmails

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.223, an unauthenticated attacker can inject messages into any existing support conversation by sending a single email to the helpdesk's public address with a crafted In-Reply-To header. No...

CVE-2026-41190

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.215, when APPSHOWONLYASSIGNEDCONVERSATIONS is enabled, direct conversation view correctly blocks users who are neither the assignee nor the creator. The savedraft AJAX path is weaker. A direct POST can create a dra...

CVE-2026-41183 FreeScout allows non-folder conversation queries to disclose assigned-only hidden conversations

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.215, the assigned-only restriction is applied to direct conversation view and folder queries, but not to non-folder query builders. Global search and the AJAX filter path still reveal conversations that should be...

FreeScout support service management system Unauthenticated Access

The vulnerability of the FreeScout support service management system is related to the improper implementation of the sequence of actions to be performed. Exploiting this vulnerability can allow a malicious actor, operating remotely, to gain unauthorized access to the system’s functions...