CVE-2025-63544: Nooncarlett Techstore XSS Vulnerability

CVE-2025-63544 Overview

CVE-2025-63544 is a reflected Cross-Site Scripting (XSS) vulnerability in Nooncarlett TechStore 1.0. The flaw resides in the /order_notes endpoint, where the id parameter is rendered without proper output encoding or input sanitization. Attackers can craft malicious URLs that execute arbitrary JavaScript in the browser of any authenticated user who follows the link.

The vulnerability is classified under [CWE-79] (Improper Neutralization of Input During Web Page Generation). It affects the confidentiality and integrity of user sessions but does not directly impact application availability.

Critical Impact
Successful exploitation enables session hijacking, credential theft, and unauthorized actions performed in the context of the victim's authenticated session in TechStore 1.0.

Affected Products

Nooncarlett TechStore 1.0
CPE: cpe:2.3:a:nooncarlett:techstore:1.0:*:*:*:*:*:*:*
Component: /order_notes endpoint, id parameter

Discovery Timeline

2025-11-07 - CVE-2025-63544 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-63544

Vulnerability Analysis

The vulnerability exists in the /order_notes endpoint of TechStore 1.0. The application reflects the value of the id query parameter directly into the HTTP response without applying HTML entity encoding or contextual output escaping. An attacker who supplies JavaScript payloads in the id parameter triggers script execution in the victim's browser.

Because the payload is reflected rather than stored, exploitation requires user interaction. The attacker must convince the victim to click a crafted link, typically delivered through phishing, malicious advertising, or third-party sites. Once executed, the injected script runs under the origin of the vulnerable TechStore application.

A proof-of-concept script is documented in the GitHub Gist PoC Script.

Root Cause

The root cause is missing input validation and output encoding on the id parameter processed by the /order_notes handler. The application trusts client-supplied input and injects it into the rendered HTML response context. There is no allow-list validation, no Content Security Policy enforcement, and no escaping routine applied before the value reaches the browser.

Attack Vector

Exploitation requires network access to the TechStore application and user interaction. The scope is changed because injected script runs in the security context of the victim's session, potentially reaching other resources under the same origin. An attacker crafts a URL such as /order_notes?id=<script>...</script> containing a payload that steals cookies, session tokens, or CSRF tokens. The victim's browser executes the payload upon loading the page, sending sensitive data to attacker-controlled infrastructure.

Refer to the GitHub Gist PoC Script for the documented exploitation technique.

Detection Methods for CVE-2025-63544

Indicators of Compromise

HTTP requests to /order_notes containing script tags, event handlers (onerror, onload), or JavaScript URI schemes in the id parameter
URL-encoded payload markers such as %3Cscript%3E, %3Cimg, or javascript%3A targeting the /order_notes route
Outbound requests from user browsers to unfamiliar domains immediately after visiting TechStore /order_notes links

Detection Strategies

Deploy web application firewall (WAF) rules that inspect the id parameter of /order_notes for HTML and JavaScript metacharacters
Review web server access logs for anomalous id parameter values containing angle brackets, quotes, or JavaScript keywords
Correlate referrer headers to identify external sites distributing malicious links pointing to /order_notes

Monitoring Recommendations

Enable Content Security Policy (CSP) violation reporting to capture blocked inline script execution attempts
Monitor for spikes in requests to /order_notes originating from external referrers or with unusual query parameters
Alert on session anomalies such as concurrent logins from different geographies following user clicks on TechStore links

How to Mitigate CVE-2025-63544

Immediate Actions Required

Restrict or disable public access to the /order_notes endpoint until a patched version is available
Deploy WAF signatures that block XSS payload patterns in the id query parameter
Enforce a strict Content Security Policy that disallows inline scripts and untrusted script sources
Notify users of the phishing risk and instruct them to avoid clicking untrusted TechStore links

Patch Information

No official vendor patch is referenced in the NVD entry at the time of publication. Administrators should consult the vendor for remediation guidance and monitor the GitHub Gist PoC Script reference for updates. Until a fix is released, apply the workarounds below.

Workarounds

Implement server-side input validation on the id parameter using an allow-list of expected values, such as numeric identifiers only
Apply contextual output encoding (HTML entity encoding) to any user-controlled value rendered into HTML responses
Set the HttpOnly and Secure flags on session cookies to reduce impact if script execution occurs
Deploy a Content Security Policy header such as Content-Security-Policy: default-src 'self'; script-src 'self' to block inline script execution

bash

# Example NGINX configuration to add CSP and cookie hardening headers
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "DENY" always;
add_header Referrer-Policy "no-referrer" always;

# Example WAF rule pattern (ModSecurity) to block XSS payloads in the id parameter
SecRule ARGS:id "@rx (?i)(<script|javascript:|onerror=|onload=)" \
    "id:1063544,phase:2,deny,status:403,msg:'Blocked XSS attempt on /order_notes id parameter'"