Urgent: High-Severity XSS Flaw Exposes Blood Bank Management System

Overview

CVE-2025-63534 identifies a critical cross-site scripting (XSS) vulnerability found in Blood Bank Management System version 1.0. This vulnerability allows attackers to inject malicious JavaScript code into the application, potentially compromising user accounts, stealing sensitive data, and performing unauthorized actions. The vulnerable component is the login.php page, where user-supplied input is not properly sanitized or encoded.

Technical Details

The vulnerability exists within the login.php component of Blood Bank Management System 1.0. The application fails to adequately sanitize or encode user input before rendering it in the response. Specifically, the msg and error parameters are susceptible to XSS injection. An attacker can craft a malicious URL containing JavaScript payloads within these parameters. When a victim clicks on this manipulated URL, the embedded JavaScript code executes in their browser within the context of the Blood Bank Management System website. This can lead to various malicious outcomes.

Example of a malicious URL:


https://example.com/login.php?msg=<script>alert('XSS Vulnerability!');</script>


CVSS Analysis

• CVE ID: CVE-2025-63534
• Published: 2025-12-01T16:15:56.117
• Severity: HIGH
• CVSS Score: 8.5
• CVSS Vector: (This would normally be a CVSS vector string, but I cannot generate one accurately without more information. It would look something like: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N)

A CVSS score of 8.5 indicates a high-severity vulnerability. This is due to the ease of exploitation (no privileges required, user interaction required only), the ability to inject code into a trusted context, and the potential for high impact in terms of confidentiality and integrity.

Possible Impact

The exploitation of this XSS vulnerability can lead to severe consequences:

• Account Compromise: An attacker can steal user credentials and gain unauthorized access to accounts.
• Data Theft: Sensitive information, such as blood donor details, medical records, and administrative data, could be stolen.
• Malware Distribution: The attacker can use the compromised website to distribute malware to visitors.
• Website Defacement: The attacker could alter the website’s content, causing reputational damage.
• Phishing Attacks: Attackers can redirect users to phishing pages to steal credentials for other services.

Mitigation and Patch Steps

To mitigate this vulnerability, the following steps are recommended:

1. Input Sanitization: Implement robust input sanitization on the msg and error parameters in login.php. Use appropriate encoding functions (e.g., htmlspecialchars() in PHP) to escape potentially malicious characters before rendering them in the HTML output.
2. Output Encoding: Ensure that all user-supplied data displayed on the website is properly encoded to prevent XSS attacks.
3. Web Application Firewall (WAF): Deploy a WAF to detect and block malicious requests, including XSS payloads.
4. Update the Application: The vendor should release a patched version of Blood Bank Management System 1.0 that addresses this vulnerability. Apply the update as soon as it becomes available. Contact the vendor for information about a patch.
5. Content Security Policy (CSP): Implement a strict CSP to restrict the sources from which the browser is allowed to load resources, effectively mitigating the risk of injected malicious scripts.