CVE-2026-4014 in Cafe Reservation System
Summary
by MITRE • 03/12/2026
A security flaw has been discovered in itsourcecode Cafe Reservation System 1.0. This impacts an unknown function of the file /curvus2/signup.php of the component Registration. Performing a manipulation of the argument Username results in sql injection. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.
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Analysis
by VulDB Data Team • 03/15/2026
The vulnerability identified as CVE-2026-4014 represents a critical sql injection flaw within the itsourcecode Cafe Reservation System version 1.0, specifically affecting the registration component. This security weakness resides in the /curvus2/signup.php file where user input validation is insufficient, creating an avenue for malicious actors to manipulate the Username parameter. The vulnerability's classification aligns with CWE-89 which defines sql injection as the insertion of malicious sql code into input fields, allowing unauthorized access to database resources. The flaw enables attackers to execute arbitrary sql commands against the backend database through the registration process, potentially compromising sensitive user information and system integrity.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with the capability to perform remote code execution and database manipulation. The attack vector requires no authentication and can be exploited through the public-facing registration interface, making it particularly dangerous for systems with minimal access controls. The fact that a public exploit has been released significantly increases the risk profile, as it eliminates the need for advanced technical skills to leverage the vulnerability. This type of attack falls under the ATT&CK technique T1190 - Exploit Public-Facing Application, which specifically addresses the exploitation of vulnerabilities in externally accessible systems.
The technical implementation of this sql injection vulnerability allows attackers to manipulate the Username parameter in ways that bypass normal input validation mechanisms. When users submit registration data through the signup.php page, the application fails to properly sanitize or escape user input before incorporating it into sql queries. This oversight creates opportunities for attackers to inject malicious sql payloads that can alter database structure, extract confidential information, or even delete entire database records. The vulnerability's remote exploitability means that attackers can target the system from anywhere on the internet, making it a particularly attractive target for automated scanning and exploitation campaigns. Security professionals should consider implementing comprehensive input validation, parameterized queries, and regular security assessments to mitigate this risk. The vulnerability demonstrates the critical importance of secure coding practices and proper input sanitization in web applications, particularly those handling user registration and authentication processes.