CVE-2026-44585 in Paymenter
Summary
by MITRE • 07/21/2026
Paymenter is a free and open-source webshop solution for management of hosting services. In versions prior to 1.5.0, the ticket creation endpoint accepts a user-supplied service identifier without enforcing ownership validation, allowing authenticated users to create support tickets referencing services belonging to other accounts by modifying the service ID in the request. An attacker could modify the service ID value in the client-side request and successfully create a ticket associated with another user's service. The vulnerability requires authentication and does not provide direct access to service contents or customer data. However, referenced service information could become visible to support personnel handling the ticket. Successful exploitation could allow an authenticated user to: create support tickets referencing services belonging to other users, potentially cause support staff to interact with or review unrelated customer services. The vulnerability did not allow direct access to another user's service, modification of another user's service or retrieval of confidential service data through the vulnerable endpoint itself. This issue has been fixed in version 1.5.0.
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Analysis
by VulDB Data Team • 07/21/2026
The Paymenter webshop solution presents a significant authorization flaw that undermines the integrity of its support ticketing system. This vulnerability exists within the ticket creation endpoint where the application fails to validate ownership of services before allowing ticket creation. The flaw stems from insufficient input validation and access control mechanisms that permit authenticated users to manipulate service identifiers in client-side requests, effectively bypassing normal permission boundaries. Such a design oversight creates a privilege escalation scenario where legitimate users can reference resources they should not have access to, fundamentally compromising the application's security model.
The technical nature of this vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems. Attackers exploiting this weakness need only authenticate to the system and modify service ID parameters in their requests to create tickets associated with other users' services. The vulnerability requires no special privileges beyond standard user authentication, making it particularly concerning as it can be leveraged by any authenticated user within the system. This flaw represents a classic case of insufficient access control validation where the application trusts client-supplied data without proper server-side verification.
The operational impact of this vulnerability extends beyond simple information disclosure, creating potential operational security risks for support personnel who may inadvertently handle tickets referencing unrelated customer services. While the vulnerability does not grant direct access to service contents or confidential data, it enables attackers to create misleading associations between support tickets and services they do not own. This could lead to misdirected support efforts, potentially exposing sensitive information through support staff interactions with unauthorized service references. The issue affects the application's ability to maintain proper service isolation, which is fundamental to multi-tenant security models.
Security controls for this vulnerability should focus on implementing robust server-side validation of service ownership during ticket creation processes. Organizations should enforce strict access control policies that validate user permissions against referenced resources before allowing any operations. The fix implemented in version 1.5.0 demonstrates the importance of proper input sanitization and authorization checks, particularly when dealing with resource identifiers in web applications. This case highlights the critical need for comprehensive security testing including authorization validation scenarios. The vulnerability also aligns with ATT&CK technique T1078 which covers valid accounts usage, as it allows exploitation through legitimate authenticated access rather than through account compromise. Proper implementation of this fix requires thorough testing of all service reference points within the application to ensure complete protection against similar unauthorized access patterns.