CVE-2022-50962: uBidAuction XSS Vulnerability

CVE-2022-50962 Overview

CVE-2022-50962 is a reflected cross-site scripting (XSS) vulnerability in uBidAuction 2.0.1, a PHP-based classic and bid auctions script distributed by AppHP. The flaw resides in the orders/myOrders module, where the date_created, date_from, date_to, and created_at filter parameters are not properly sanitized before being reflected in the HTTP response. Remote attackers can craft malicious GET requests that execute arbitrary JavaScript in the browser of any authenticated victim who follows the URL. The issue is tracked under CWE-79 (Improper Neutralization of Input During Web Page Generation).

Critical Impact

Successful exploitation allows attackers to steal session cookies, perform actions on behalf of authenticated auction users, and deliver phishing content from a trusted application origin.

Affected Products

• uBidAuction 2.0.1 (AppHP Classic and Bid Auctions Script)
• The orders/myOrders module filter functionality
• Deployments exposing the auction frontend to untrusted users

Discovery Timeline

• 2026-05-10 - CVE-2022-50962 published to NVD
• 2026-05-12 - Last updated in NVD database

Technical Details for CVE-2022-50962

Vulnerability Analysis

The vulnerability is a classic reflected XSS condition within the order management view of uBidAuction 2.0.1. When users apply date filters in the orders/myOrders interface, the application accepts the date_created, date_from, date_to, and created_at parameters through HTTP GET requests. The application reflects these values back into the rendered HTML without encoding output or validating input.

An attacker who delivers a crafted link to an authenticated user triggers script execution in the victim's browser under the auction site's origin. The attacker can hijack the session, manipulate bids, or redirect the user to attacker-controlled infrastructure. Because the payload is delivered through a URL, social engineering and email lures are common delivery channels.

Root Cause

The root cause is missing input sanitization and missing output encoding on user-supplied filter parameters in the orders/myOrders module. The application trusts client-supplied values and writes them directly into the response body. No context-aware escaping is applied for HTML, attribute, or JavaScript contexts.

Attack Vector

Exploitation requires network access to the application and user interaction, since the victim must load the attacker-crafted URL while authenticated. No privileges are required by the attacker to construct the payload. Technical details are documented in the Exploit-DB #50693 entry, the VulnCheck Advisory on uBidAuction, and Vulnerability Lab Report #2289.

No verified exploit code is reproduced here. See the Exploit-DB and Vulnerability Lab references above for the published proof of concept against the orders/myOrders filter parameters.

Detection Methods for CVE-2022-50962

Indicators of Compromise

• GET requests to orders/myOrders containing HTML or JavaScript metacharacters such as <, >, ", or script within the date_created, date_from, date_to, or created_at parameters.
• Web server access logs showing URL-encoded payloads (for example %3Cscript%3E) targeting the filter parameters.
• Referrer headers from external domains pointing users to crafted myOrders URLs.

Detection Strategies

• Deploy a web application firewall (WAF) rule that inspects the four filter parameters for HTML tags, event handlers, and JavaScript schemes.
• Enable HTTP request logging on the auction application and search historical logs for parameter values containing <script, onerror=, or javascript:.
• Correlate XSS payload patterns with authenticated session activity to identify successful exploitation attempts.

Monitoring Recommendations

• Forward web server and application logs to a centralized analytics platform and alert on anomalous query string content targeting orders/myOrders.
• Monitor for outbound requests from end-user browsers to unknown domains immediately after myOrders page loads, indicating possible cookie exfiltration.
• Track session token reuse across geographically distinct source addresses, which can indicate session hijacking from a successful XSS.

How to Mitigate CVE-2022-50962

Immediate Actions Required

• Restrict access to the orders/myOrders module to authenticated, trusted users until a fix is applied.
• Deploy WAF signatures that block requests containing script tags or event handlers in the affected GET parameters.
• Enforce the HttpOnly and Secure flags on session cookies to reduce the impact of any client-side script execution.

Patch Information

No vendor patch is referenced in the available advisories. Administrators should contact AppHP through the AppHP Auction Script Overview page for an updated build and apply server-side input validation to the date_created, date_from, date_to, and created_at parameters.

Workarounds

• Add server-side validation that accepts only ISO 8601 date strings for the affected parameters and rejects all other input.
• Apply context-aware output encoding (HTML entity encoding) when rendering filter values back into the page.
• Configure a strict Content Security Policy (CSP) that disallows inline scripts and untrusted script sources for the auction application.

# Example nginx rule to block obvious XSS payloads on the affected endpoint
location /orders/myOrders {
    if ($args ~* "(<|%3C)script|onerror=|javascript:") {
        return 403;
    }
    proxy_pass http://ubidauction_backend;
}