CVE-2025-6836 is a SQL Injection vulnerability identified in version 1.0 of the code-projects Library System, specifically within an unknown function in the /profile.php file. The vulnerability arises from improper sanitization or validation of the 'phone' parameter, which allows an attacker to inject malicious SQL code remotely without requiring authentication or user interaction. This injection flaw can potentially be exploited to manipulate backend database queries, leading to unauthorized data access, data modification, or even deletion. The vulnerability is classified with a CVSS 4.0 base score of 6.9, indicating a medium severity level. The vector string (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P) highlights that the attack can be performed remotely over the network with low attack complexity, no privileges or user interaction required, and partial impacts on confidentiality, integrity, and availability. Although no official patch or exploit in the wild has been reported yet, the public disclosure of the exploit code increases the risk of exploitation. The mention that other parameters might also be vulnerable suggests a broader attack surface within the application, potentially increasing the risk if not addressed comprehensively. SQL Injection remains one of the most critical web application vulnerabilities due to its potential to compromise entire databases and underlying systems.

For European organizations using the code-projects Library System 1.0, this vulnerability poses a significant risk to the confidentiality, integrity, and availability of sensitive data managed within the library system, including user profiles and possibly lending records. Exploitation could lead to unauthorized data disclosure, data tampering, or denial of service, impacting operational continuity and compliance with data protection regulations such as GDPR. Given the remote exploitability without authentication, attackers could leverage this vulnerability to gain footholds within organizational networks or pivot to other systems. The public availability of exploit details increases the likelihood of opportunistic attacks, especially targeting smaller institutions or libraries with limited cybersecurity resources. Additionally, if the system interfaces with other internal or external services, the compromise could extend beyond the library system itself, amplifying the impact. The medium CVSS score reflects partial impact but combined with the ease of exploitation, the threat should be taken seriously by affected entities.

Organizations should immediately conduct a thorough security review of the code-projects Library System, focusing on input validation and sanitization of all user-supplied parameters, especially the 'phone' parameter in /profile.php and any other potentially vulnerable inputs. Applying parameterized queries or prepared statements is critical to prevent SQL injection. Since no official patch is currently available, organizations should consider implementing Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection patterns targeting the vulnerable endpoints. Network segmentation and strict access controls can limit the exposure of the library system to untrusted networks. Regular monitoring of logs for suspicious database queries or unusual application behavior is recommended to detect potential exploitation attempts early. Organizations should also plan for timely patching once an official fix is released and consider alternative software solutions if remediation is delayed. Finally, raising awareness among IT and security teams about this vulnerability and its exploitation methods will help in proactive defense.