CVE-2025-6889 is a critical SQL Injection vulnerability identified in version 1.0 of the code-projects Movie Ticketing System, specifically within the /logIn.php file. The vulnerability arises from improper sanitization or validation of the 'postName' parameter, which is susceptible to malicious input manipulation. An attacker can remotely exploit this flaw without requiring authentication or user interaction, by injecting crafted SQL commands through the vulnerable parameter. This can lead to unauthorized access to the backend database, allowing attackers to read, modify, or delete sensitive data, potentially compromising user credentials, ticketing information, and other critical system data. Although the CVSS 4.0 score is 6.9 (medium severity), the vector metrics indicate that the attack is network-based (AV:N), requires no privileges (PR:N), no user interaction (UI:N), and has low impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). The exploit has been publicly disclosed, increasing the risk of exploitation, although no known active exploits have been reported in the wild yet. The vulnerability affects only version 1.0 of the product, and no official patches or mitigations have been published at this time.

For European organizations using the code-projects Movie Ticketing System 1.0, this vulnerability poses a significant risk to the confidentiality and integrity of customer and business data. Exploitation could lead to unauthorized data disclosure, manipulation of ticketing transactions, and potential disruption of service availability. Given the nature of ticketing systems, attackers might also leverage this vulnerability to commit fraud or disrupt event operations. The remote and unauthenticated nature of the exploit increases the attack surface, especially for publicly accessible web applications. Organizations in Europe that handle large volumes of customer data or operate critical event infrastructure could face reputational damage, regulatory penalties under GDPR for data breaches, and financial losses. The medium CVSS score suggests moderate impact, but the critical classification and public exploit disclosure warrant urgent attention.

1. Immediate code review and input validation: Developers should implement strict input validation and parameterized queries (prepared statements) for the 'postName' parameter in /logIn.php to prevent SQL injection. 2. Web Application Firewall (WAF): Deploy or update WAF rules to detect and block SQL injection attempts targeting the vulnerable parameter. 3. Network segmentation: Restrict external access to the ticketing system backend where possible, limiting exposure to potential attackers. 4. Monitoring and logging: Enable detailed logging of web requests and database queries to detect suspicious activity related to SQL injection attempts. 5. Patch management: Engage with the vendor or community to obtain or develop patches addressing this vulnerability and apply them promptly once available. 6. Incident response readiness: Prepare to respond to potential exploitation attempts, including data breach notification procedures compliant with GDPR. 7. Alternative mitigations: If immediate patching is not possible, consider disabling or restricting the vulnerable functionality temporarily to reduce risk.