CVE-2025-63527 identifies a cross-site scripting (XSS) vulnerability in Blood Bank Management System (BBMS) version 1.0, specifically within the updateprofile.php and hprofile.php scripts. The vulnerability arises because the application fails to properly sanitize or encode user-supplied inputs before rendering them in the HTTP response. The affected parameters include hname, hemail, hpassword, hphone, and hcity, which accept user input that is reflected back to the browser without adequate filtering or encoding. This allows an attacker to inject arbitrary JavaScript code that executes in the context of the victim's browser when they view the affected pages. The CVSS v3.1 score of 8.5 reflects a high severity, with an attack vector of network (remote), low attack complexity, no user interaction required, and privileges required being low (authenticated user). The scope is changed, indicating that the vulnerability affects components beyond the initially vulnerable module. The impact is high on confidentiality, as the attacker can steal sensitive information such as session tokens or personal data, with limited impact on integrity and no impact on availability. Although no public exploits are currently known, the vulnerability poses a significant risk to the confidentiality of sensitive healthcare data managed by the BBMS. The CWE-79 classification confirms this is a classic reflected or stored XSS issue. The lack of patches or official fixes increases the urgency for organizations to implement mitigations. Given the nature of the system managing critical blood bank data, exploitation could lead to unauthorized data disclosure, session hijacking, or phishing attacks targeting healthcare personnel.

For European organizations, particularly those in the healthcare sector using the Blood Bank Management System 1.0, this vulnerability could lead to severe confidentiality breaches involving sensitive patient and donor information. Attackers could execute malicious scripts to steal session cookies, impersonate users, or manipulate displayed data, undermining trust in healthcare services. The potential for session hijacking or data leakage could disrupt blood bank operations, delay critical medical procedures, and violate GDPR regulations, leading to legal and financial repercussions. Since the vulnerability requires only low privileges and no user interaction, it can be exploited remotely by authenticated users, increasing the risk of insider threats or compromised accounts being leveraged. The scope change in the CVSS vector suggests that exploitation could affect multiple components or users, amplifying the impact. Disruption or data compromise in blood bank systems could also have cascading effects on hospital supply chains and emergency response capabilities across Europe.

Organizations should immediately implement strict input validation and output encoding on all user-supplied data in the affected parameters (hname, hemail, hpassword, hphone, hcity) within updateprofile.php and hprofile.php. Employ context-aware encoding (e.g., HTML entity encoding) to neutralize injected scripts. Deploy a Web Application Firewall (WAF) configured to detect and block XSS payloads targeting these endpoints. Conduct thorough code reviews and security testing to identify and remediate similar vulnerabilities in other components. Restrict access to the affected pages to trusted users and monitor logs for suspicious activity indicative of attempted XSS exploitation. Educate users about phishing risks stemming from XSS attacks. Since no official patch is available, consider isolating the vulnerable system or applying temporary input filtering at the network or proxy level. Plan for an urgent update or replacement of the BBMS software with a secure version once available. Ensure compliance with GDPR by promptly reporting any data breaches resulting from exploitation.