CVE-2026-112249 in grandnode2
Summary
by MITRE • 10/19/2026
A vulnerability was detected in grandnode grandnode2 up to 2.3.0. Affected is the function Html.Raw of the file src/Web/Grand.Web/Views/Product/Product.Layout.Simple.cshtml of the component Product Description Handler. The manipulation results in cross site scripting. The attack can be launched remotely. Upgrading to version 2.4.0-beta and 2.4.0 is able to address this issue. The patch is identified as 41a8e349eab8d9641cf6ea800d738f2d8991ca22. Upgrading the affected component is recommended. The vendor was contacted early about this disclosure.
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Analysis
by VulDB Data Team • 10/19/2026
The identified vulnerability represents a classic instance of Cross-Site Scripting, specifically categorized under CWE-79: Improper Neutralization of Input During Web Page Generation. This flaw resides within the Product Description Handler component of the GrandNode e-commerce platform, affecting versions up to 2.3.0. The root cause is traced to the improper use of the Html.Raw function in the file src/Web/Grand.Web/Views/Product/Product.Layout.Simple.cshtml. In ASP.NET MVC applications, the Html helper methods are designed to automatically encode output to prevent script injection. However, by explicitly invoking Html.Raw, developers instruct the framework to render the provided string as raw HTML without any encoding or sanitization. When this function processes user-supplied input from product descriptions, it fails to validate or escape special characters that could be interpreted as executable JavaScript code by a victim's browser.
From an operational perspective, this vulnerability allows for remote exploitation with significant consequences for both end-users and the organization hosting the platform. An attacker can craft malicious content within a product description field, which is then stored in the database. When another user views this compromised product page, their browser executes the injected script in the context of the vulnerable website's domain. This enables session hijacking, where attackers steal authentication cookies to impersonate legitimate users, or credential theft through phishing mechanisms embedded in the malicious scripts. Furthermore, it can lead to defacement of the site interface and potentially serve as a vector for further attacks such as keylogging or redirecting victims to malicious external sites designed to distribute malware.
The attack surface is broad because product descriptions are typically user-editable fields accessible via standard web interfaces without requiring administrative privileges in many configurations. This aligns with MITRE ATT&CK technique T1059, Command and Scripting Interpreter, specifically through browser-based execution of JavaScript payloads. The ability to launch this attack remotely means that no physical access or local network proximity is required; a simple link to the compromised product page can trigger the exploit if viewed by an authenticated user with active sessions on the GrandNode instance.
To mitigate this risk and prevent future occurrences, it is imperative to upgrade the GrandNode installation to version 2.4.0-beta or later, where the vendor has addressed the issue in patch commit 41a8e349eab8d9641cf6ea800d738f2d8991ca22. This update likely replaces the unsafe Html.Raw call with a method that properly encodes output, such as using standard HTML helpers or implementing strict input validation and output encoding strategies consistent with OWASP guidelines. For organizations unable to immediately upgrade, temporary mitigations include implementing Web Application Firewall rules to detect and block common XSS payloads in product description inputs, although this is not a substitute for fixing the underlying code flaw. Regular security audits of view templates are recommended to ensure that raw HTML rendering functions are only used on trusted data sources where input sanitization has been rigorously applied at the model level before reaching the view layer.