CVE-2026-5835: Online Shoe Store 1.0 XSS Vulnerability

CVE-2026-5835 Overview

A Cross-Site Scripting (XSS) vulnerability has been discovered in code-projects Online Shoe Store version 1.0. This vulnerability exists in the /admin/admin_football.php file, where improper handling of the product_name argument allows attackers to inject malicious scripts. The vulnerability can be exploited remotely, and proof-of-concept exploit code has been publicly disclosed.

Critical Impact

Attackers with administrative privileges can inject malicious scripts that execute in the context of other users' browsers, potentially leading to session hijacking, credential theft, or defacement of the administrative interface.

Affected Products

• code-projects Online Shoe Store 1.0
• /admin/admin_football.php endpoint

Discovery Timeline

• 2026-04-09 - CVE-2026-5835 published to NVD
• 2026-04-09 - Last updated in NVD database

Technical Details for CVE-2026-5835

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting (XSS). The flaw resides in the administrative panel of the Online Shoe Store application, specifically within the admin_football.php file. When processing the product_name parameter, the application fails to properly sanitize or encode user-supplied input before rendering it in the HTML response.

The attack requires network access and can be launched remotely. The exploit has been publicly disclosed and is available for use, increasing the risk of active exploitation in the wild.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding in the product_name argument handling within /admin/admin_football.php. The application directly incorporates user-controlled data into the web page output without proper sanitization, allowing injection of arbitrary HTML and JavaScript code.

Attack Vector

The attack vector is network-based, requiring an authenticated user with high privileges (administrative access) to inject the malicious payload. The attack also requires user interaction, as a victim must visit the page containing the injected script for the payload to execute. An attacker can craft a malicious product_name value containing JavaScript code that, when processed by the vulnerable endpoint, gets embedded in the response and executed in the browser context of other users viewing the affected page.

The vulnerability mechanism involves manipulation of the product_name parameter passed to /admin/admin_football.php. When this parameter contains script tags or JavaScript event handlers, the application fails to sanitize the input, resulting in the malicious code being rendered in the page output. For detailed technical analysis and proof-of-concept details, refer to the GitHub Issue Tracker and VulDB Vulnerability #356291.

Detection Methods for CVE-2026-5835

Indicators of Compromise

• Unusual JavaScript or HTML tags appearing in product name fields within the database
• Unexpected script execution or browser alerts when accessing the admin football products page
• Web server logs showing suspicious characters (e.g., <script>, javascript:, onerror=) in requests to /admin/admin_football.php

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block XSS payloads in requests targeting the /admin/admin_football.php endpoint
• Monitor HTTP request logs for suspicious patterns in the product_name parameter, including encoded script tags and event handlers
• Deploy content security policy (CSP) headers to detect and report inline script execution violations

Monitoring Recommendations

• Enable detailed logging for all administrative panel access and parameter submissions
• Configure alerts for requests containing common XSS payload signatures targeting the affected endpoint
• Regularly audit product name entries in the database for unexpected HTML or script content

How to Mitigate CVE-2026-5835

Immediate Actions Required

• Restrict access to the administrative panel (/admin/) to trusted IP addresses only
• Implement input validation on the product_name parameter to reject HTML and script tags
• Apply output encoding (HTML entity encoding) when displaying product names in the web interface
• Review and sanitize existing product name entries in the database for malicious content

Patch Information

No official patch has been released by the vendor at this time. Users of code-projects Online Shoe Store 1.0 should implement the workarounds listed below until an official fix is available. Monitor the Code Projects Resource page for security updates.

For additional vulnerability details and tracking information, refer to VulDB Submission #788340 and VulDB CTI for #356291.

Workarounds

• Implement server-side input validation to strip or reject HTML tags and JavaScript from the product_name field
• Apply output encoding using htmlspecialchars() or equivalent functions when rendering product names
• Deploy a Web Application Firewall (WAF) with XSS protection rules enabled for the administrative panel
• Implement Content Security Policy (CSP) headers to prevent inline script execution

# Example Apache configuration to add CSP headers
<Directory "/var/www/html/admin">
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'"
    Header set X-XSS-Protection "1; mode=block"
    Header set X-Content-Type-Options "nosniff"
</Directory>