CVE-2026-54648 in CubeCart
Summary
by MITRE • 09/18/2026
CubeCart is an ecommerce software solution. Prior to 6.7.5, the GDPR tools in admin/sources/customers.gdpr.inc.php rely on page-level CC_PERM_READ access and do not require CC_PERM_DELETE for the purge, no_order_purge, or delete_guests commands. An authenticated administrator with read-only customer privileges can invoke these backend actions directly to bypass interface restrictions and irreversibly delete customer records, accounts without orders, or guest accounts, compromising data integrity and availability. This issue is fixed in version 6.7.5.
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Analysis
by VulDB Data Team • 09/18/2026
CubeCart represents a widely utilized ecommerce platform that manages sensitive customer data including personal identifiers, purchase histories, and contact information. The security architecture of the application relies on role-based access control mechanisms to restrict administrative functions based on user privileges. Specifically, the GDPR compliance tools located within the admin sources directory are designed to handle data privacy requests such as account deletion or anonymization in accordance with regulatory requirements like the General Data Protection Regulation. These features include commands for purging orders, removing accounts without associated transactions, and deleting guest records. The integrity of these operations depends heavily on strict enforcement of permission levels to prevent unauthorized modification or destruction of critical business data.
A significant vulnerability exists in versions prior to 6.7.5 where the backend logic governing these GDPR tools fails to enforce adequate authorization checks for destructive actions. While the user interface correctly restricts access based on permissions, the underlying PHP code responsible for processing commands such as no_order_purge and delete_guests relies solely on CC_PERM_READ rather than requiring CC_PERM_DELETE. This architectural flaw creates a direct path for privilege escalation where an authenticated administrator possessing only read-only privileges can bypass intended restrictions. By invoking these backend endpoints directly through crafted HTTP requests, the attacker circumvents the interface-level safeguards that would normally prevent such actions from being executed by low-privilege users.
The operational impact of this vulnerability is severe as it allows for the irreversible deletion of customer records and accounts without orders or guest entries. This constitutes a compromise of data integrity because authorized personnel are prevented from managing their user roles effectively, while unauthorized actors can alter critical datasets. Furthermore, the availability aspect is impacted since malicious users can cause denial of service by systematically deleting large volumes of customer data, potentially disrupting business operations and violating legal obligations regarding data retention or privacy rights. The ability to delete guest accounts without proper authorization also poses risks related to audit trails and forensic analysis capabilities required during security incidents.
This flaw aligns with CWE-862 which describes missing authorization checks that allow users to perform actions they should not be permitted to execute. It is further categorized under MITRE ATT&CK technique T1078 valid accounts where an attacker leverages legitimate credentials but exploits insufficient access controls to achieve unauthorized outcomes. The vulnerability highlights the critical importance of implementing defense-in-depth strategies where backend logic must independently verify permissions regardless of frontend restrictions or user interface configurations. Developers often mistakenly assume that UI-level checks are sufficient, leading to discrepancies between intended and actual security postures.
Mitigation for this issue involves upgrading CubeCart to version 6.7.5 or later which corrects the permission validation logic within the GDPR tools. Administrators should ensure that all administrative accounts adhere strictly to the principle of least privilege, granting delete permissions only to those roles explicitly required to perform data destruction tasks. Additionally implementing comprehensive logging and monitoring for customer record modifications can help detect any unauthorized deletion attempts in environments where immediate patching is not feasible. Regular security audits focusing on access control lists and backend permission enforcement are essential to prevent similar authorization bypasses across other modules of the ecommerce platform.