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

CVE-2025-63528 Overview

A cross-site scripting (XSS) vulnerability exists in the Blood Bank Management System 1.0 within the blooddinfo.php component. The application fails to properly sanitize or encode user-supplied input before rendering it in the response. An attacker can inject malicious JavaScript payloads into the error parameter, which is then executed in the victim's browser when the page is viewed.

This reflected XSS vulnerability enables attackers to steal session cookies, perform actions on behalf of authenticated users, redirect victims to malicious websites, or deface web content. Given that Blood Bank Management Systems handle sensitive medical and personal data, exploitation could lead to unauthorized access to donor information, blood inventory records, and other protected health information.

Critical Impact

Attackers can execute arbitrary JavaScript in the context of authenticated user sessions, potentially compromising sensitive medical data and donor information stored in the Blood Bank Management System.

Affected Products

• Shridharshukl Blood Bank Management System 1.0
• blooddinfo.php component with unsanitized error parameter
• All deployments running version 1.0 of the Blood Bank Management System

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

CVE-2025-63528 is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The vulnerability carries a CVSS 3.1 base score of 5.4 (Medium severity) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Breaking down the CVSS metrics:

• Attack Vector (AV:N): Network-based exploitation requiring no physical or local access
• Attack Complexity (AC:L): Low complexity with no specialized conditions required
• Privileges Required (PR:L): Low-level privileges needed to exploit
• User Interaction (UI:R): Requires victim to click a malicious link or visit a crafted page
• Scope (S:C): Changed scope, meaning the vulnerable component impacts resources beyond its security scope
• Confidentiality/Integrity (C:L/I:L): Low impact to both confidentiality and integrity
• Availability (A:N): No impact on availability

The EPSS (Exploit Prediction Scoring System) score is 0.031% with an 8.437 percentile ranking, indicating a relatively low probability of active exploitation in the wild.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding in the blooddinfo.php component. When the application receives user input through the error parameter, it directly reflects this content back to the user's browser without proper sanitization or HTML entity encoding. This allows attackers to inject arbitrary HTML and JavaScript code that executes within the security context of the victim's browser session.

The vulnerable component fails to implement:

• Input validation to reject or sanitize special characters
• Output encoding to convert dangerous characters to their HTML entity equivalents
• Content Security Policy (CSP) headers to mitigate script execution

Attack Vector

The attack is network-based and follows a reflected XSS pattern. An attacker crafts a malicious URL containing JavaScript payload in the error parameter and tricks a victim into clicking the link. When the victim accesses the crafted URL while authenticated to the Blood Bank Management System, the malicious script executes in their browser with access to their session context.

The exploitation flow involves crafting a specially constructed URL targeting the blooddinfo.php endpoint with a JavaScript payload embedded in the error parameter. When a victim visits this URL, the malicious script executes within the context of their authenticated session, allowing the attacker to potentially steal session tokens, harvest credentials, or perform unauthorized actions.

For detailed technical information on the exploitation mechanism, refer to the external exploit documentation.

Detection Methods for CVE-2025-63528

Indicators of Compromise

• Unusual HTTP requests to blooddinfo.php containing <script> tags or JavaScript event handlers in the error parameter
• Web server access logs showing URL-encoded JavaScript payloads (e.g., %3Cscript%3E, javascript:, onerror=)
• User reports of unexpected browser behavior or pop-ups when accessing the Blood Bank Management System
• Suspicious outbound connections from client browsers to unknown external domains after visiting the application

Detection Strategies

Organizations should implement web application firewall (WAF) rules to detect and block requests containing common XSS payload patterns targeting the error parameter. Regular log analysis should focus on identifying requests with encoded special characters, script tags, or JavaScript event handlers.

SentinelOne Singularity provides behavioral detection capabilities that can identify XSS exploitation attempts through:

• Real-time web traffic analysis detecting malicious script injection patterns
• Endpoint detection of suspicious browser behavior following XSS exploitation
• Network traffic monitoring for data exfiltration attempts post-compromise

Monitoring Recommendations

Implement comprehensive logging for all requests to the blooddinfo.php endpoint, with particular attention to the error parameter contents. Configure alerts for patterns matching common XSS payloads including but not limited to script tags, event handlers (onclick, onerror, onload), and javascript: protocol handlers.

Deploy intrusion detection signatures specifically targeting reflected XSS patterns and establish baseline behavior for legitimate application usage to identify anomalous request patterns.

How to Mitigate CVE-2025-63528

Immediate Actions Required

• Restrict access to the Blood Bank Management System to trusted networks only until a patch is available
• Implement a Web Application Firewall (WAF) with rules to block XSS payloads in the error parameter
• Educate users about the risks of clicking untrusted links to the Blood Bank Management System
• Review access logs for evidence of exploitation attempts and investigate any suspicious activity
• Consider temporarily disabling or removing the blooddinfo.php component if not critical to operations

Patch Information

As of the last NVD update on 2025-12-02, no official patch has been released by the vendor. Organizations should monitor the Blood Bank Management System GitHub repository for security updates.

The vulnerability affects version 1.0 of the Blood Bank Management System. Administrators should check for newer versions that may address this security issue and apply updates as they become available.

Workarounds

Until an official patch is released, organizations can implement the following mitigations:

Server-side input validation should be implemented to sanitize the error parameter by stripping or encoding HTML special characters. This can be achieved through PHP's htmlspecialchars() or htmlentities() functions when outputting user-supplied data.

Additionally, implementing Content Security Policy (CSP) headers can significantly reduce the impact of XSS vulnerabilities by restricting the execution of inline scripts:

# Apache configuration to add CSP headers
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'"

# Additional security headers
Header set X-XSS-Protection "1; mode=block"
Header set X-Content-Type-Options "nosniff"

For nginx deployments:

# Nginx configuration to add security headers
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header X-Content-Type-Options "nosniff" always;

These configurations help mitigate XSS attacks by preventing execution of inline scripts and scripts from untrusted sources.