CVE-2025-5650 is a SQL Injection vulnerability identified in version 1.0 of the 1000projects Online Notice Board application, specifically within the /register.php file. The vulnerability arises from improper sanitization or validation of the 'fname' parameter, which allows an attacker to inject malicious SQL code remotely without any authentication or user interaction. This injection flaw could potentially allow an attacker 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 metrics show that the attack can be performed remotely (AV:N), requires no privileges (PR:N), no user interaction (UI:N), and no authentication (AT:N). The impact on confidentiality, integrity, and availability is rated as low to medium (VC:L, VI:L, VA:L), suggesting that while the vulnerability can be exploited remotely, the extent of damage may be limited by the application’s database structure or other mitigating factors. No official patches or fixes have been published yet, and although no known exploits are currently active in the wild, the public disclosure of the vulnerability increases the risk of exploitation. The mention that other parameters might also be vulnerable indicates a broader attack surface within the application, potentially increasing the risk if not addressed promptly.

For European organizations using the 1000projects Online Notice Board 1.0, this vulnerability poses a significant risk to the confidentiality and integrity of stored data, particularly user registration information. Exploitation could lead to unauthorized access to sensitive personal data, which would have serious implications under the EU's GDPR regulations, potentially resulting in legal penalties and reputational damage. Additionally, data manipulation or deletion could disrupt business operations relying on the notice board for internal communications or announcements. Given the remote and unauthenticated nature of the exploit, attackers could leverage this vulnerability to gain a foothold within the network or escalate attacks against other connected systems. The medium severity rating suggests that while the vulnerability is exploitable, the impact might be somewhat contained, but organizations should not underestimate the risk, especially in sectors handling sensitive or regulated data.

Organizations should immediately conduct a thorough code review of the /register.php file and any other input handling code to identify and remediate SQL injection flaws. Implementing parameterized queries or prepared statements is critical to prevent injection attacks. Input validation and sanitization should be enforced on all user-supplied data, especially the 'fname' parameter and any other potentially vulnerable inputs. Since no official patches are available, organizations should consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting this application. Monitoring and logging of database queries and application logs should be enhanced to detect suspicious activities early. If feasible, isolating the affected application from critical systems and databases can limit potential damage. Finally, organizations should plan for an update or patch deployment once the vendor releases a fix and consider alternative notice board solutions if remediation is delayed.