CVE-2025-11066 is a SQL Injection vulnerability identified in version 1.0 of the code-projects Online Bidding System, specifically within the /administrator/bidlist.php file. The vulnerability arises from improper sanitization or validation of the 'ID' parameter, which can be manipulated by an attacker to inject malicious SQL code. This flaw allows an unauthenticated remote attacker to execute arbitrary SQL queries against the backend database without requiring user interaction or privileges. The CVSS 4.0 base score is 6.9 (medium severity), reflecting that the attack vector is network-based (AV:N), requires no authentication (PR:N), and no user interaction (UI:N). The impact on confidentiality, integrity, and availability is rated low individually but combined they contribute to a medium severity rating. Exploiting this vulnerability could lead to unauthorized data access, data modification, or disruption of the bidding system's operations. Although no known exploits have been reported in the wild yet, the exploit code has been published, increasing the risk of exploitation. The absence of patches or vendor-provided fixes at the time of publication further elevates the threat. This vulnerability is critical for environments where the Online Bidding System is used to manage sensitive bidding data or financial transactions, as attackers could leverage the flaw to extract confidential information or manipulate bids.

For European organizations using the code-projects Online Bidding System 1.0, this vulnerability poses a significant risk to the confidentiality and integrity of bidding data and potentially financial transactions. Exploitation could lead to unauthorized disclosure of sensitive bidder information, manipulation of bids, or disruption of auction processes, undermining trust and causing financial losses. Organizations in sectors such as government procurement, financial services, and large-scale commercial auctions are particularly vulnerable. The remote and unauthenticated nature of the attack vector means that attackers can exploit the vulnerability without insider access, increasing the threat surface. Additionally, the lack of available patches means organizations must rely on compensating controls, which may not fully mitigate the risk. Given the interconnected nature of European markets and regulatory requirements around data protection (e.g., GDPR), a breach resulting from this vulnerability could also lead to regulatory penalties and reputational damage.

1. Immediate mitigation should include implementing Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the 'ID' parameter in /administrator/bidlist.php. 2. Conduct a thorough code review and apply input validation and parameterized queries or prepared statements to sanitize all user inputs, especially the 'ID' parameter. 3. Restrict access to the /administrator directory using network-level controls such as IP whitelisting or VPN access to limit exposure. 4. Monitor logs for suspicious SQL query patterns or repeated access attempts to the vulnerable endpoint. 5. If possible, isolate the bidding system database with strict least privilege principles to minimize the impact of a successful injection. 6. Engage with the vendor or community to obtain or develop patches and apply them promptly once available. 7. Educate administrators and developers about secure coding practices to prevent similar vulnerabilities in future versions. 8. Consider deploying runtime application self-protection (RASP) tools to detect and block injection attacks dynamically.