CVE-2026-78434 in Helpdesk
Summary
by MITRE • 08/25/2026
A flaw has been found in Faveo Helpdesk up to 2.0.3. This impacts the function FormController::post_ticket_reply of the file app/Http/Controllers/Client/helpdesk/FormController.php of the component post-ticket-reply Endpoint. This manipulation causes missing authentication. The attack can be initiated remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 08/25/2026
The vulnerability identified in Faveo Helpdesk versions up to 2.0.3 represents a critical authentication bypass within the application's core ticketing functionality. Specifically, this flaw resides in the FormController::post_ticket_reply method located at app/Http/Controllers/Client/helpdesk/FormController.php. This endpoint is designed to handle incoming replies for support tickets submitted by clients or agents through the web interface. The fundamental technical defect lies in the absence of proper access control verification before processing the request, allowing any unauthenticated user to interact with this function as if they were a legitimate, logged-in user.
From a classification perspective, this vulnerability aligns directly with CWE-287, which denotes Improper Authentication. By failing to validate session tokens or verify user credentials prior to executing business logic associated with ticket replies, the application exposes itself to unauthorized manipulation. This is further compounded by the fact that the attack vector is remote, meaning an adversary does not need physical access or local network proximity to exploit this weakness. The simplicity of the flaw suggests a likely oversight in middleware configuration or controller-level security checks during development.
The operational impact of this vulnerability is severe for organizations relying on Faveo Helpdesk for customer support operations. An attacker can forge requests to post replies to existing tickets without authentication, potentially leading to data integrity issues such as false information being added to ticket histories, which undermines trust in the support process. Furthermore, depending on how subsequent logic handles these inputs, there is a risk of Cross-Site Scripting or SQL injection if input sanitization is also insufficient, although the primary issue remains the lack of authentication. This could allow attackers to escalate privileges by manipulating tickets assigned to higher-level administrators or sensitive accounts, effectively gaining unauthorized access to internal communication channels and customer data.
The situation is exacerbated by the fact that an exploit for this vulnerability has already been published in public repositories, increasing the likelihood of automated attacks against exposed instances. Additionally, the project maintainers have not yet responded to early issue reports regarding this problem, leaving users without official patches or guidance on remediation through code updates. This lack of vendor response necessitates immediate proactive measures by system administrators and security teams responsible for deploying Faveo Helpdesk.
To mitigate this risk in the absence of an official patch, organizations should implement network-level controls such as Web Application Firewalls configured to detect and block anomalous POST requests to the ticket reply endpoint that lack valid session cookies or authentication headers. Restricting access to the helpdesk interface via IP whitelisting can also reduce exposure if the application is internet-facing. It is critical for administrators to monitor logs for unusual activity on this specific controller method and consider temporarily disabling public registration or external access until a secure version of Faveo Helpdesk beyond 2.0.3 is released and deployed. Regular vulnerability scanning should be maintained to detect any further unpatched flaws in the application stack.