CVE-2026-3148 identifies a SQL injection vulnerability in the SourceCodester Simple and Nice Shopping Cart Script version 1.0, specifically within the /signup.php file. The vulnerability stems from inadequate input validation and sanitization of the 'Username' parameter, which is directly incorporated into SQL queries without proper escaping or parameterization. This allows an attacker to inject malicious SQL code remotely, without requiring authentication or user interaction. Exploiting this vulnerability could enable attackers to retrieve, modify, or delete sensitive data from the underlying database, potentially compromising user credentials, personal information, or transactional data. The vulnerability was publicly disclosed on February 25, 2026, with a CVSS 4.0 base score of 6.9, indicating a medium severity level. The attack vector is network-based with low attack complexity and no privileges or user interaction needed. The vulnerability impacts the confidentiality, integrity, and availability of the affected system, although the scope is limited to installations running version 1.0 of this specific shopping cart script. No patches or official fixes have been published yet, and no known exploits have been observed in the wild. However, the public disclosure increases the risk of exploitation attempts. The lack of CWE classification suggests the vulnerability is straightforward SQL injection due to improper input handling. Organizations using this software should urgently assess their exposure and implement mitigations to prevent exploitation.

The SQL injection vulnerability in the Simple and Nice Shopping Cart Script can have significant impacts on organizations using this software. Successful exploitation could lead to unauthorized access to sensitive customer data, including usernames, passwords, and potentially payment information, thereby compromising confidentiality. Attackers could also modify or delete data, affecting data integrity and disrupting business operations. In worst-case scenarios, attackers might execute administrative commands on the database, leading to denial of service or further system compromise. Given the vulnerability requires no authentication or user interaction and can be exploited remotely, the attack surface is broad. This increases the risk for e-commerce platforms relying on this script, potentially damaging customer trust and leading to regulatory penalties for data breaches. The absence of patches means organizations remain exposed until mitigations are applied or updates are released. Although no known exploits are currently active, the public disclosure may prompt attackers to develop exploit code, increasing the likelihood of attacks globally.

To mitigate CVE-2026-3148, organizations should immediately implement strict input validation and sanitization on the 'Username' parameter in /signup.php, employing parameterized queries or prepared statements to prevent SQL injection. If source code modification is feasible, refactor database access code to use secure database APIs that separate code from data. Deploy Web Application Firewalls (WAFs) with rules targeting SQL injection patterns to provide an additional layer of defense. Monitor web server and database logs for suspicious activity indicative of injection attempts. Restrict database user privileges to the minimum necessary to limit potential damage from exploitation. Conduct thorough code audits of the entire application to identify and remediate similar injection flaws. Until an official patch is released, consider isolating or disabling the vulnerable signup functionality if possible. Educate development teams on secure coding practices to prevent future vulnerabilities. Finally, maintain regular backups of databases to enable recovery in case of data compromise.