CVE-2025-63528: Blood Bank Management System XSS Flaw

CVE-2025-63528 Overview

CVE-2025-63528 is a reflected cross-site scripting (XSS) vulnerability in Shridharshukl Blood Bank Management System version 1.0. The flaw resides in the blooddinfo.php component. The application fails to sanitize or encode user-supplied input before reflecting it in the HTTP response. An attacker can inject JavaScript through the error parameter, which executes in the victim's browser when the crafted URL is visited. The vulnerability is classified under [CWE-79] Improper Neutralization of Input During Web Page Generation.

Critical Impact

Successful exploitation allows attackers to execute arbitrary JavaScript in authenticated users' browsers, enabling session hijacking, credential theft, and unauthorized actions within the blood bank application.

Affected Products

• Shridharshukl Blood Bank Management System 1.0
• blooddinfo.php component
• Deployments referencing the upstream GitHub Blood Bank Management System codebase

Discovery Timeline

• 2025-12-01 - CVE-2025-63528 published to NVD
• 2025-12-02 - Last updated in NVD database

Technical Details for CVE-2025-63528

Vulnerability Analysis

The vulnerability is a reflected XSS flaw in the blooddinfo.php script of the Blood Bank Management System. The script accepts an error query parameter intended to display status or error messages. The application echoes the parameter value directly into the rendered HTML response without applying output encoding or input validation. Attackers craft a URL containing JavaScript in the error parameter and deliver it to authenticated users through phishing or social engineering. When the victim loads the URL, the injected script executes in the security context of the application origin. The scope change indicated by the CVSS vector reflects that injected script can impact resources beyond the vulnerable component, such as session cookies for the parent domain.

Root Cause

The root cause is missing output encoding when reflecting the error GET parameter into the HTML response. The application treats user-controlled data as trusted markup rather than as text. No Content Security Policy (CSP) header is enforced to constrain script execution, and the error parameter is not filtered against script-bearing characters such as <, >, and quote delimiters.

Attack Vector

Exploitation requires the attacker to deliver a crafted URL to a user with an active session in the Blood Bank Management System. The attacker constructs a request to blooddinfo.php with a malicious payload in the error parameter. Once the user opens the link, the browser parses the reflected markup and executes the embedded JavaScript. Typical payloads exfiltrate cookies, capture form input, or perform forced administrative actions through the victim's authenticated session. Additional technical details are documented in the CVE-2025-63528 advisory write-up.

Detection Methods for CVE-2025-63528

Indicators of Compromise

• Web server access logs containing blooddinfo.php requests with error parameter values that include <script, onerror=, onload=, javascript:, or URL-encoded equivalents such as %3Cscript
• Outbound HTTP requests from user browsers to attacker-controlled domains immediately following access to blooddinfo.php
• Unexpected session cookie reuse from disparate source IP addresses for the same user account

Detection Strategies

• Deploy a web application firewall (WAF) signature that flags HTML and JavaScript metacharacters in the error query parameter for blooddinfo.php
• Review PHP error logs and access logs for repeated probing of blooddinfo.php with abnormal query string lengths or encoded payloads
• Implement Content Security Policy violation reporting to capture inline script execution attempts originating from the application origin

Monitoring Recommendations

• Alert on HTTP 200 responses to blooddinfo.php that contain reflected <script> or event handler markup in the body
• Monitor authenticated user sessions for anomalous administrative actions performed shortly after the user accessed an externally referred URL
• Correlate referer headers pointing to untrusted domains with subsequent state-changing POST requests inside the application

How to Mitigate CVE-2025-63528

Immediate Actions Required

• Restrict external access to blooddinfo.php until a fix is deployed, especially for internet-facing deployments of the Blood Bank Management System
• Apply context-aware output encoding to the error parameter using htmlspecialchars($_GET['error'], ENT_QUOTES, 'UTF-8') before rendering it in HTML
• Enforce a strict Content Security Policy that disallows inline scripts and untrusted script sources

Patch Information

No official vendor patch is listed in the NVD record at publication time. Administrators should monitor the upstream Blood Bank Management System repository for fixes and apply input encoding manually in blooddinfo.php until a vendor release is available.

Workarounds

• Deploy a WAF rule that blocks requests to blooddinfo.php containing <, >, or javascript: in any query parameter
• Set the session cookie attributes HttpOnly, Secure, and SameSite=Strict to limit cookie theft impact from injected script
• Educate authenticated users to avoid clicking unsolicited links referencing the blood bank application

# Example Apache mod_security rule to block script payloads in the error parameter
SecRule ARGS:error "@rx (?i)(<script|onerror=|onload=|javascript:)" \
    "id:1006328,phase:2,deny,status:403,msg:'CVE-2025-63528 XSS attempt on blooddinfo.php'"