CVE-2025-7587 is a critical SQL Injection vulnerability identified in version 1.0 of the code-projects Online Appointment Booking System. The vulnerability resides in the /cover.php file, specifically in the handling of the uname and psw parameters. An attacker can remotely manipulate these parameters without any authentication or user interaction to inject malicious SQL code. This injection can lead to unauthorized access to the backend database, potentially allowing the attacker to read, modify, or delete sensitive data. The vulnerability is exploitable over the network (AV:N), requires no privileges (PR:N), no user interaction (UI:N), and has partial impacts on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). The CVSS 4.0 base score is 6.9, categorized as medium severity, reflecting the ease of exploitation combined with limited but significant impact. Although no known exploits are currently observed in the wild, the public disclosure of the exploit code increases the risk of active exploitation. The lack of patches or mitigations from the vendor further exacerbates the threat. SQL Injection vulnerabilities are among the most dangerous web application flaws, often leading to data breaches, privilege escalation, and full system compromise if chained with other vulnerabilities. Given that this is an appointment booking system, the compromised data could include personally identifiable information (PII), appointment details, and potentially payment or authentication credentials, which are critical for privacy and regulatory compliance.

For European organizations using the affected Online Appointment Booking System 1.0, this vulnerability poses a significant risk to data confidentiality and integrity. Exploitation could lead to unauthorized disclosure of customer and employee data, violating GDPR and other data protection regulations, resulting in legal penalties and reputational damage. The integrity of appointment schedules and related business processes could be disrupted, causing operational downtime and loss of customer trust. Additionally, attackers could leverage the vulnerability to pivot into internal networks, escalating the impact beyond the web application. Healthcare providers, government agencies, and service companies relying on such booking systems are particularly at risk due to the sensitivity of the data handled. The remote and unauthenticated nature of the exploit increases the likelihood of widespread attacks, especially if automated scanning tools target vulnerable installations. The absence of vendor patches means organizations must rely on immediate mitigation strategies to prevent exploitation.

1. Immediate mitigation should include implementing Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the uname and psw parameters in /cover.php. 2. Conduct a thorough code review and apply input validation and parameterized queries or prepared statements to sanitize all user inputs, especially uname and psw. 3. If possible, isolate the affected system from critical internal networks to limit lateral movement in case of compromise. 4. Monitor logs for suspicious activities related to SQL errors or unusual access patterns to detect exploitation attempts early. 5. Consider replacing or upgrading the Online Appointment Booking System to a version without this vulnerability or to a different product with a strong security posture. 6. Educate IT staff about the risks of SQL injection and ensure secure coding practices are followed in future development. 7. Regularly back up data and test restoration procedures to minimize impact in case of data corruption or loss. 8. Engage with the vendor or community to track patch releases and apply updates promptly once available.