CVE-2026-109605 in Simple Cafe Billing System
Summary
by MITRE • 10/13/2026
A security vulnerability has been detected in SourceCodester Simple Cafe Billing System 1.0. This affects the function Action::save_user of the file admin_class.php of the component User Management. The manipulation of the argument Type leads to improper authorization. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.
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Analysis
by VulDB Data Team • 10/13/2026
The SourceCodester Simple Cafe Billing System version 1.0 contains a critical security flaw within its administrative interface, specifically located in the Action::save_user function of the admin_class.php file. This vulnerability falls under the category of improper authorization, which is formally classified as CWE-269 in the Common Weakness Enumeration database. The core issue stems from an insufficient validation mechanism when processing user management operations. Specifically, the manipulation of the Type argument allows an attacker to bypass intended access controls, effectively granting unauthorized privileges or allowing actions that should be restricted to higher-level administrators. This type of flaw is characteristic of broken access control vulnerabilities where the application fails to enforce proper policy regarding who can perform what actions on specific resources.
The operational impact of this vulnerability is severe due to its remote exploitability and public disclosure status. Because the attack vector is network-accessible, a malicious actor does not require physical proximity or local system access to initiate an exploitation attempt. By crafting specific HTTP requests that manipulate the Type parameter during user creation or modification processes, an attacker can escalate their privileges within the application environment. This could lead to full administrative control over the billing system, allowing for unauthorized data manipulation, theft of sensitive customer information, alteration of financial records, and potential disruption of business operations. The public availability of exploit code significantly lowers the barrier to entry for attackers, increasing the likelihood of automated scanning tools targeting this specific weakness in deployed instances that have not been patched or mitigated.
From a threat intelligence perspective, this vulnerability aligns with techniques observed in the MITRE ATT&CK framework, particularly those related to privilege escalation and unauthorized access through API manipulation. Attackers often leverage such flaws to establish persistence within an organization's network by creating backdoor accounts with elevated permissions. The lack of robust input validation on critical administrative endpoints represents a fundamental design flaw that undermines the integrity of the entire application security model. Without strict enforcement of role-based access control policies at the function level, any authenticated user or even unauthenticated users if session management is also flawed can potentially exploit this logic error to gain unauthorized entry points into sensitive system functions.
To mitigate this risk, immediate remediation efforts should focus on implementing rigorous server-side validation for all input parameters, particularly those influencing authorization decisions like the Type argument in the save_user function. Developers must ensure that access control checks are performed consistently and cannot be bypassed by manipulating request payloads. It is essential to adopt a principle of least privilege where administrative functions require explicit verification of user roles before execution. Additionally, implementing comprehensive logging and monitoring for unusual patterns in admin panel activity can help detect exploitation attempts early. Organizations using this software should apply any available patches from the vendor or consider migrating to more secure alternatives if updates are not forthcoming. Regular security audits and penetration testing focused on access control mechanisms are recommended to identify similar weaknesses across other components of the application infrastructure.