CVE-2026-0699 identifies a SQL injection vulnerability in the code-projects Intern Membership Management System version 1.0, specifically within the /intern/admin/edit_activity.php script. The vulnerability arises from improper sanitization of the activity_id parameter, allowing an attacker to inject arbitrary SQL commands. This can lead to unauthorized data disclosure, modification, or deletion within the backend database. The vulnerability is remotely exploitable without user interaction but requires the attacker to have high privileges, which suggests that the attacker must already have some level of authenticated access, possibly as an admin or privileged user. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no authentication required (AT:N), but high privileges (PR:H), and no user interaction (UI:N). The impact on confidentiality, integrity, and availability is low individually but combined can be significant. No patches or official fixes have been published yet, and while no exploits are known in the wild, proof-of-concept code is available, increasing the risk of exploitation. The vulnerability affects only version 1.0 of the product, which is a membership management system likely used by organizations to manage intern or membership data. The lack of scope change (S:U) means the vulnerability affects only the vulnerable component. The vulnerability's presence in an administrative interface increases the risk if access controls are weak. Overall, this vulnerability represents a moderate risk that requires timely remediation.

For European organizations using the code-projects Intern Membership Management System, this vulnerability poses a risk of unauthorized access to sensitive membership or intern data, potentially leading to data breaches or manipulation of records. The SQL injection could allow attackers to exfiltrate confidential information, alter membership statuses, or disrupt system availability. Since exploitation requires high privileges, the threat is more significant if internal accounts are compromised or if access controls are lax. The impact on data integrity and confidentiality could lead to regulatory non-compliance under GDPR, resulting in legal and financial consequences. Additionally, disruption of membership management processes could affect organizational operations and reputation. The medium severity suggests a moderate but actionable risk, especially for organizations relying heavily on this system for critical membership workflows.

To mitigate this vulnerability, organizations should immediately implement strict input validation and sanitization on the activity_id parameter to prevent SQL injection. Employing parameterized queries or prepared statements in the backend code is essential to eliminate injection vectors. Access to the /intern/admin/edit_activity.php endpoint should be restricted to trusted, authenticated users with the minimum necessary privileges. Organizations should conduct a thorough review of user roles and permissions to ensure no excessive privileges are granted. Monitoring and logging of administrative actions can help detect suspicious activity early. Since no official patch is currently available, consider isolating or disabling the vulnerable functionality until a fix is released. Regularly update and audit the membership management system and related components. Finally, educate administrators about the risks of SQL injection and enforce strong authentication mechanisms to reduce the risk of privilege escalation.