CVE-2026-112066 in Cookie Consent
Summary
by MITRE • 10/20/2026
The JSON import of the cookie consent configuration did not respect the backend user's permissions. Non-admin backend users with access to the module could import a configuration that adds arbitrary scripts to the frontend of the website.
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Analysis
by VulDB Data Team • 10/20/2026
This vulnerability represents a critical authorization bypass within the content management system, specifically affecting the JSON import functionality for cookie consent configurations. The core technical flaw lies in the insufficient validation of user privileges during the data ingestion process. While the application correctly restricts access to the module based on role-based permissions, it fails to enforce these same constraints when processing imported configuration files. This architectural oversight allows non-administrative backend users who possess basic editing rights for cookie settings to upload a JSON payload that contains arbitrary JavaScript code. By exploiting this gap in permission checking, an attacker can bypass the intended security boundaries and inject malicious scripts directly into the frontend delivery pipeline of the website.
The operational impact of this vulnerability is severe, as it effectively grants low-privilege users the ability to execute cross-site scripting attacks against all visitors of the site. Once a malicious configuration is imported, the injected scripts are rendered by the browser in the context of the trusted domain associated with the cookie consent banner or related frontend components. This enables attackers to perform session hijacking by stealing authentication cookies, deface the website interface, redirect users to phishing sites, or harvest sensitive user data such as login credentials and personal information entered into forms on the page. Because the script is served from a legitimate origin, it bypasses many browser-based security controls like same-origin policy restrictions that would typically prevent external scripts from accessing local storage or interacting with other elements on the page.
From an industry standard perspective, this vulnerability aligns closely with CWE-269, which describes Improper Privilege Control, as the system fails to enforce appropriate access levels for a specific action. It also maps directly to CWE-749, Exposed Dangerous Method or Function, because it allows users with limited privileges to invoke functionality that should be reserved for administrators. In terms of attack vectors and tactics, this flaw facilitates the MITRE ATT&CK technique T1059.007, JavaScript Execution, which is often used in conjunction with T1189 Drive-by Compromise or T1204 User Execution if social engineering is involved to trick an admin into approving the import. The vulnerability essentially transforms a configuration management feature into a persistent web shell-like mechanism for frontend code injection.
Mitigation strategies must focus on implementing strict server-side validation of user permissions at every stage of data processing, not just during initial module access. Developers should ensure that any action involving system-wide changes or security-critical configurations requires explicit administrative privileges verified against the current session's role attributes. Additionally, input sanitization is crucial; even if permission checks are robust, validating and escaping special characters in imported JSON payloads can prevent script execution. Implementing a Content Security Policy with strict nonce-based or hash-based restrictions for inline scripts further mitigates the impact by ensuring that only authorized, pre-approved code snippets execute within the browser environment. Regular security audits of import mechanisms and role definitions will help maintain these controls over time as new features are added to the platform.