CVE-2024-7321: Blood Bank Management System XSS Vulnerability

CVE-2024-7321 Overview

CVE-2024-7321 is a reflected cross-site scripting (XSS) vulnerability [CWE-79] in itsourcecode Online Blood Bank Management System 1.0. The flaw resides in the signup.php file within the User Registration Handler component. Attackers can manipulate the user argument to inject arbitrary script content that executes in the victim's browser session.

The vulnerability is exploitable remotely without authentication or user interaction on the attacker side. Public disclosure of the exploit details increases the risk of opportunistic use against exposed installations. The issue is tracked publicly as VDB-273232.

Critical Impact
Remote attackers can inject arbitrary JavaScript into the registration flow, enabling session theft, credential harvesting, and browser-based attacks against users of the Online Blood Bank Management System.

Affected Products

Adonesevangelista Online Blood Bank Management System 1.0
signup.php User Registration Handler component
Deployments exposing the user parameter to untrusted input

Discovery Timeline

2024-07-31 - CVE-2024-7321 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-7321

Vulnerability Analysis

The vulnerability is a reflected cross-site scripting flaw in the user registration workflow of the Online Blood Bank Management System. The application accepts the user parameter submitted to signup.php and reflects it back into the HTML response without proper output encoding or input sanitization. An attacker can craft a URL or form submission containing JavaScript payloads that execute in the browser of any user who processes the response.

Because the registration endpoint is publicly reachable and requires no authentication, exploitation can be initiated remotely with minimal effort. The impact is limited to browser-side execution in the context of the affected application, which can still enable session hijacking, phishing overlays, and unauthorized actions performed as the victim.

Root Cause

The root cause is missing input validation and output encoding on the user parameter handled by signup.php. User-controlled data flows into the rendered HTML response without HTML entity encoding or context-aware sanitization, satisfying the [CWE-79] pattern for improper neutralization of input during web page generation.

Attack Vector

An attacker delivers a crafted link containing a malicious user parameter value to a target, or hosts a page that submits the payload to the vulnerable endpoint. When the server reflects the payload into the response, the injected script runs in the victim's browser under the origin of the Online Blood Bank Management System. No prior authentication is required to trigger the reflection.

No verified proof-of-concept code is published in the referenced sources. See the GitHub CVE Issue Discussion and the VulDB #273232 Details for the public technical write-up.

Detection Methods for CVE-2024-7321

Indicators of Compromise

HTTP requests to signup.php containing user parameter values with <script>, onerror=, javascript:, or encoded variants such as %3Cscript%3E
Web server access logs showing repeated registration requests from a single source with anomalous query strings
Browser console errors or unexpected outbound requests originating from the registration page

Detection Strategies

Deploy Web Application Firewall (WAF) rules that inspect the user parameter for HTML and JavaScript metacharacters before requests reach signup.php
Correlate reflected content in HTTP responses with the original request parameters to identify successful XSS reflections
Baseline normal registration traffic patterns and alert on outliers in parameter length, character sets, or referrer values

Monitoring Recommendations

Enable verbose logging on the web server for all POST and GET requests to signup.php, capturing full query strings and request bodies
Forward web server and application logs to a centralized analytics platform for retention and cross-source correlation
Monitor Content Security Policy (CSP) violation reports to surface script execution attempts blocked by browser policies

How to Mitigate CVE-2024-7321

Immediate Actions Required

Restrict public access to the Online Blood Bank Management System 1.0 registration endpoint until a fix is applied, using network controls or authentication front-ends
Deploy WAF signatures that block XSS payloads targeting the user parameter of signup.php
Audit existing user records for entries containing script content that may indicate prior exploitation attempts

Patch Information

No vendor patch or security advisory is referenced in the available CVE data for CVE-2024-7321. Organizations should track the VulDB #273232 Threat Report and the GitHub CVE Issue Discussion for remediation updates from the vendor.

Workarounds

Apply server-side input validation on the user parameter to reject or strip HTML and JavaScript metacharacters before processing
Implement context-aware output encoding when reflecting user-supplied values into HTML responses
Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
Set the HttpOnly and Secure flags on session cookies to reduce the impact of successful script injection

bash

# Example nginx WAF-style rule to block obvious XSS payloads in the user parameter
location /signup.php {
    if ($arg_user ~* "(<|%3C)script|javascript:|onerror=|onload=") {
        return 403;
    }
}