CVE-2026-2220 is a SQL injection vulnerability identified in the code-projects Online Reviewer System version 1.0. The vulnerability arises from improper sanitization or validation of the difficulty_id parameter in the PHP file located at /system/system/admins/assessments/pretest/btn_functions.php. An attacker can remotely send crafted input to this parameter, which is directly incorporated into SQL queries without adequate escaping or parameterization, allowing arbitrary SQL commands to be executed on the backend database. This can lead to unauthorized data disclosure, data modification, or even deletion, depending on the database privileges of the application. The vulnerability is exploitable without authentication or user interaction, making it accessible to any remote attacker aware of the flaw. Although no known active exploitation has been reported, the availability of public exploit code significantly raises the risk of attacks. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and impacts on confidentiality, integrity, and availability at a low level. The lack of a vendor patch at the time of publication necessitates immediate mitigation efforts by affected organizations.

The impact of CVE-2026-2220 on organizations using the code-projects Online Reviewer System can be significant. Successful exploitation could allow attackers to extract sensitive information such as user data, assessment results, or administrative credentials stored in the backend database. Data integrity could be compromised through unauthorized modification or deletion of records, potentially disrupting the review or assessment processes. Availability might also be affected if attackers execute destructive SQL commands or cause database errors. Given the remote and unauthenticated nature of the exploit, attackers can launch attacks at scale, increasing the risk of widespread data breaches or service disruptions. Organizations relying on this system for educational or certification purposes may face reputational damage, regulatory penalties, and operational setbacks if the vulnerability is exploited.

To mitigate CVE-2026-2220, organizations should first seek any official patches or updates from the vendor and apply them promptly once available. In the absence of a patch, immediate mitigation can include implementing Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the difficulty_id parameter. Input validation and sanitization should be enforced at the application level, ensuring that difficulty_id accepts only expected numeric or enumerated values. Employing parameterized queries or prepared statements in the affected PHP code is critical to prevent injection. Additionally, restricting database user privileges to the minimum necessary can limit the potential damage of an injection attack. Monitoring logs for suspicious SQL errors or unusual query patterns related to the affected endpoint can help detect attempted exploitation. Finally, organizations should consider isolating or restricting access to the vulnerable system until a permanent fix is applied.