Description

TechStore 1.0 is vulnerable to Cross Site Scripting (XSS). In contact_display, the application echoes the id parameter verbatim into the rendered page, permitting execution of attacker-supplied JavaScript in users browser.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.1",
  "pubDate": "2026-08-31T21:17:06.210Z",
  "pubdate": "2026-08-31T21:17:06.210Z",
  "executiveSummary": "TechStore 1.0 is susceptible to a Reflected Cross-Site Scripting (XSS) vulnerability located within the contact_display module.\nThe application fails to properly sanitize or encode user-supplied input provided through the 'id' parameter, allowing for the direct injection and execution of arbitrary JavaScript within the context of a victim's web browser session.\nThis vulnerability poses a significant security risk, as it enables unauthorized actors to execute malicious scripts in the security context of the victim's session.\nPotential impacts include session hijacking, theft of sensitive authentication cookies, unauthorized actions performed on behalf of the user, and the potential for defacement or redirection to malicious third-party domains.\nExploitation does not require elevated privileges; however, it necessitates social engineering or the distribution of a malicious link to a target user. Successful exploitation circumvents the Same-Origin Policy (SOP) by leveraging the trusted relationship between the victim and the TechStore application.",
  "technicalDetails": "The root cause of this vulnerability is improper input validation and output encoding in the 'contact_display' component of TechStore 1.0. When a user navigates to the application with a specifically crafted 'id' parameter in the HTTP GET request, the application backend processes the request and subsequently echoes the content of this parameter directly into the Document Object Model (DOM) of the rendered HTML response without implementing adequate sanitization filters.\nThe vulnerability manifests because the server-side code does not distinguish between legitimate data and executable scripts, treating the 'id' parameter as trusted content. By injecting a payload such as <script>alert(document.cookie)</script> into the URL parameter, an attacker can force the victim's browser to parse the injected script as legitimate site content.\nThe attack flow proceeds as follows: First, the attacker crafts a malicious URL containing the XSS payload. Second, the attacker distributes this link to an authenticated or unauthenticated user of the TechStore application. Third, upon the victim clicking the link, the victim's browser sends the request to the TechStore server, which processes the input and returns an HTTP response containing the injected malicious script. Fourth, the victim's browser parses the malicious JavaScript and executes it within the origin of the TechStore application.\nThe exposure of this vulnerability is global, as it is accessible via standard HTTP/HTTPS protocols over the network. As the script executes within the victim's browser, the payload can access sensitive data, including document.cookie, localStorage, and sessionStorage, allowing an attacker to exfiltrate session tokens to a remote listener. Furthermore, the script can modify the rendered page content or invoke background requests (AJAX/Fetch) to perform actions on behalf of the authenticated user without their explicit consent.\nThis vulnerability is persistent in the sense that the reflected content is tied to the specific request parameters, and the lack of output encoding ensures that any HTML/JavaScript tags passed via the 'id' parameter are rendered as active elements by the browser's HTML parser, leading to full browser-side code execution."
}