SourceCodester Class and Exam Timetabling System 1.0 contains an SQL injection vulnerability in the /archive4.php file. The vulnerability arises from improper sanitization of the 'sy' parameter, enabling remote attackers to inject SQL commands. This can lead to unauthorized database queries or modifications. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and low to limited confidentiality, integrity, and availability impacts. No official patch or vendor remediation level has been published as of now.

Successful exploitation of this vulnerability could allow an unauthenticated remote attacker to execute arbitrary SQL commands on the backend database. This may result in unauthorized data access or modification with limited confidentiality, integrity, and availability impact as per the CVSS vector. Since the exploit is publicly available, the risk of exploitation is increased, although no active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider implementing web application firewall (WAF) rules to detect and block SQL injection attempts targeting the 'sy' parameter in /archive4.php. Restricting database permissions and monitoring for suspicious activity may also help mitigate risk. Avoid deploying the affected version in production environments if possible.