CVE-2026-3746 identifies a SQL injection vulnerability in the SourceCodester Simple Responsive Tourism Website version 1.0. The vulnerability exists in the Login.php file, specifically in the login functionality where the Username parameter is not properly sanitized or validated. This allows an attacker to craft malicious SQL statements that are executed by the backend database, potentially leading to unauthorized data retrieval, modification, or deletion. The attack vector is remote and requires no authentication or user interaction, making it easier to exploit. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and partial impacts on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). The vulnerability does not affect system confidentiality, integrity, or availability completely but can lead to significant data exposure or manipulation. No known exploits are currently in the wild, and no official patches have been published, increasing the urgency for manual mitigation. The vulnerability affects only version 1.0 of the product, which is a web-based tourism site template or application, commonly used for small to medium tourism business websites.

The SQL injection vulnerability can allow attackers to bypass authentication, access sensitive user data, manipulate or delete database records, and potentially compromise the entire web application backend. This can lead to data breaches, loss of customer trust, and operational disruptions. For organizations relying on this tourism website software, the impact includes exposure of personal identifiable information (PII), financial data, or business-sensitive information. Additionally, attackers could leverage this vulnerability to pivot into the internal network or deploy further attacks such as ransomware or webshells. The medium severity rating reflects the balance between ease of exploitation and partial impact on system security properties. However, the lack of authentication requirements and remote exploitability increase the risk profile for affected deployments.

Organizations should immediately review and sanitize all user inputs, especially the Username parameter in the Login.php file, to prevent SQL injection. Implement parameterized queries or prepared statements in the database access layer to eliminate direct concatenation of user inputs into SQL commands. Conduct a thorough code audit of the entire application to identify and remediate similar injection points. Until an official patch is released, consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection patterns targeting the login functionality. Restrict database user permissions to the minimum necessary to limit the impact of any successful injection. Monitor logs for suspicious login attempts or unusual database queries. If possible, isolate the affected application in a segmented network zone to reduce lateral movement risks. Finally, plan for timely patching once a vendor update becomes available.