CVE-2025-11956 identifies a Stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79 in the OBS Student Affairs Information System developed by Proliz Software Ltd. Co. The flaw stems from improper neutralization of user-supplied input during dynamic web page generation, allowing malicious scripts to be persistently stored and executed in the context of other users' browsers. This vulnerability affects versions prior to 25.0401. The CVSS 3.1 base score of 8.9 reflects a high severity, with an attack vector of network (AV:N), low attack complexity (AC:L), requiring privileges (PR:L) and user interaction (UI:R). The scope is changed (S:C), indicating that exploitation can affect resources beyond the vulnerable component. The impact on confidentiality and integrity is high (C:H, I:H), while availability impact is low (A:L). An attacker with limited privileges can inject malicious JavaScript code that executes when other users access the affected pages, potentially leading to session hijacking, credential theft, or unauthorized actions within the system. No public exploits are currently known, but the vulnerability's nature and severity make it a significant risk, especially in environments where the OBS system manages sensitive student data. The vulnerability was reserved on 2025-10-20 and published on 2025-11-06, with no patches currently linked, indicating the need for immediate vendor response and user mitigation.

For European organizations, particularly educational institutions using the OBS Student Affairs Information System, this vulnerability poses a significant risk to the confidentiality and integrity of sensitive student data. Exploitation could allow attackers to hijack user sessions, steal credentials, or perform unauthorized actions such as altering student records or accessing private information. This could lead to data breaches, reputational damage, regulatory non-compliance (e.g., GDPR violations), and potential operational disruptions. Since the vulnerability requires some level of authentication and user interaction, insider threats or compromised accounts could be leveraged to initiate attacks. The persistence of the stored XSS increases the risk as multiple users may be affected over time. The low availability impact suggests system downtime is unlikely, but the overall risk to data security and trustworthiness of the system is high. European institutions must prioritize addressing this vulnerability to protect student privacy and maintain compliance with data protection regulations.

1. Apply vendor patches immediately once released for OBS versions prior to 25.0401. 2. Until patches are available, implement strict input validation and sanitization on all user inputs, especially those reflected in web pages. 3. Employ robust output encoding (e.g., HTML entity encoding) to neutralize potentially malicious scripts before rendering. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce XSS impact. 5. Conduct regular security audits and penetration testing focused on web application inputs and outputs. 6. Monitor logs and user activities for unusual behavior indicative of XSS exploitation attempts. 7. Educate users and administrators about the risks of XSS and encourage cautious handling of suspicious links or inputs. 8. Consider implementing multi-factor authentication to reduce the risk posed by compromised credentials. 9. Isolate the OBS system within a secure network segment to limit lateral movement if exploited. 10. Collaborate with the vendor to expedite patch development and share threat intelligence within the educational sector.