CVE-2025-4247 is a SQL Injection vulnerability identified in version 1.0 of the SourceCodester Simple To-Do List System, specifically within the /delete_task.php file. The vulnerability arises from improper sanitization or validation of the 'ID' parameter, which is used in SQL queries to delete tasks. An attacker can manipulate this parameter to inject malicious SQL code, potentially allowing unauthorized access to or modification of the underlying database. The vulnerability is remotely exploitable without requiring user interaction or authentication, increasing its risk profile. Although the CVSS 4.0 score is rated medium at 5.3, the vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and low impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). The vulnerability does not affect system components beyond the application scope (SC:N) and does not involve scope change (SI:N) or security requirements (SA:N). No known exploits are currently reported in the wild, and no official patches have been published yet. However, public disclosure of the exploit code increases the likelihood of exploitation attempts.

For European organizations using the SourceCodester Simple To-Do List System 1.0, this vulnerability poses a moderate risk. Successful exploitation could allow attackers to manipulate or delete database entries, potentially leading to data loss, unauthorized data exposure, or disruption of task management workflows. While the impact on confidentiality, integrity, and availability is rated low individually, combined effects could disrupt business operations, especially in environments relying heavily on this system for task tracking. The lack of authentication requirements and remote exploitability make it easier for attackers to target exposed instances. Organizations in sectors with stringent data protection regulations, such as finance, healthcare, or government, could face compliance risks if sensitive data is exposed or altered. Additionally, the public availability of exploit code increases the urgency for mitigation to prevent opportunistic attacks.

Given the absence of official patches, European organizations should implement immediate compensating controls. First, restrict access to the /delete_task.php endpoint by implementing network-level controls such as IP whitelisting or VPN-only access to reduce exposure. Employ web application firewalls (WAFs) with custom rules to detect and block SQL injection patterns targeting the 'ID' parameter. Conduct thorough input validation and sanitization on all user-supplied data, especially the 'ID' parameter, using parameterized queries or prepared statements to prevent injection. Regularly audit and monitor database logs for suspicious queries or anomalies. If feasible, upgrade or replace the affected Simple To-Do List System with a more secure alternative or a patched version once available. Additionally, educate development and operations teams about secure coding practices and the risks of SQL injection to prevent similar vulnerabilities in future deployments.