CVE-2026-30529 identifies a SQL Injection vulnerability in the SourceCodester Online Food Ordering System version 1.0. The flaw exists in the Actions.php file within the save_user action, where the application fails to properly sanitize the 'username' parameter supplied by authenticated users. This improper input handling allows attackers who have valid credentials to inject arbitrary SQL commands into the backend database queries. SQL Injection vulnerabilities can lead to unauthorized data retrieval, data corruption, or even full compromise of the database server depending on the privileges of the database user. Since the vulnerability requires authentication, it limits exploitation to users who have some level of access, but does not require additional user interaction beyond submitting crafted input. No CVSS score has been assigned yet, and no patches or known exploits are currently available. The vulnerability highlights a common security oversight in web applications where input sanitization is insufficient, emphasizing the need for secure coding practices such as prepared statements and input validation. Organizations using this software should audit their systems and apply mitigations promptly to prevent potential exploitation.

The impact of this vulnerability can be significant for organizations using the affected SourceCodester Online Food Ordering System. An authenticated attacker could exploit the SQL Injection flaw to access sensitive customer data, modify user accounts, or corrupt order information. This could lead to data breaches, loss of customer trust, financial loss, and potential regulatory penalties depending on the jurisdiction. Additionally, attackers might escalate privileges within the database or pivot to other parts of the network if the database user has excessive permissions. The disruption of ordering services could also impact business operations and revenue. Since the vulnerability requires authentication, insider threats or compromised credentials increase the risk. Without timely remediation, organizations remain exposed to these risks, which could be exploited in targeted attacks or automated campaigns once exploit code becomes available.

To mitigate this vulnerability, organizations should immediately review and update the source code of the affected Actions.php file to ensure proper sanitization of the 'username' parameter. Specifically, developers should implement parameterized queries or prepared statements to prevent SQL Injection. Input validation should be enforced to reject or sanitize unexpected characters in user inputs. Database user permissions should be minimized to restrict the impact of any potential injection. Additionally, organizations should monitor logs for suspicious activity related to the save_user action and enforce strong authentication controls to reduce the risk of credential compromise. If possible, apply web application firewalls (WAFs) with rules designed to detect and block SQL Injection attempts. Regular security assessments and code reviews should be conducted to identify and remediate similar vulnerabilities. Finally, organizations should stay alert for official patches or updates from SourceCodester and apply them promptly once available.