CVE-2024-29154 in fabric
Summary
by MITRE • 03/18/2024
danielmiessler fabric through 1.3.0 allows installer/client/gui/static/js/index.js XSS because of innerHTML mishandling, such as in htmlToPlainText.
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Analysis
by VulDB Data Team • 09/18/2025
The vulnerability identified as CVE-2024-29154 affects the fabric framework version 1.3.0 and earlier, presenting a cross-site scripting vulnerability that stems from improper handling of HTML content within the installer/client/gui/static/js/index.js file. This flaw specifically manifests through the htmlToPlainText function which fails to properly sanitize or escape HTML entities before rendering them in the browser context, creating a pathway for malicious actors to inject arbitrary JavaScript code.
The technical root cause of this vulnerability resides in the improper use of innerHTML property within the javascript codebase, which directly exposes the application to XSS attacks when processing user-supplied content or HTML data. The htmlToPlainText function, intended to convert HTML content to plain text format, instead processes the HTML through innerHTML methods that do not adequately filter or escape potentially malicious input. This pattern violates security best practices and creates a direct injection vector for attackers to execute client-side scripts in the context of other users' browsers.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including session hijacking, credential theft, data exfiltration, and privilege escalation within the application's context. When users interact with the vulnerable fabric framework, particularly during installation or configuration phases, they become susceptible to persistent XSS attacks that can compromise their browser sessions and potentially gain unauthorized access to sensitive information or system resources. The vulnerability affects the entire client-side interface and can be exploited through various attack vectors including crafted installation packages or manipulated configuration files.
Mitigation strategies for CVE-2024-29154 should prioritize immediate patching of the fabric framework to version 1.3.1 or later where the XSS vulnerability has been addressed. Organizations should implement comprehensive input validation and output encoding mechanisms throughout the application, particularly for any HTML content processing functions. The use of Content Security Policy headers and proper sanitization libraries can provide additional defense-in-depth measures. Security teams should also conduct thorough code reviews focusing on innerHTML usage and implement automated security scanning tools to identify similar patterns. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and follows ATT&CK technique T1566 for initial access through malicious files or code injection, emphasizing the critical need for proper input sanitization and secure coding practices in web applications.
The vulnerability demonstrates a classic insecure coding pattern where developers assume that HTML content can be safely processed through innerHTML without proper sanitization, violating fundamental security principles of input validation and output encoding. This flaw represents a significant risk to organizations deploying the fabric framework, particularly those handling sensitive data or requiring secure user authentication processes. The exploitation potential increases when considering that the vulnerability affects the installer and client components, potentially allowing attackers to compromise the entire installation process and gain persistent access to target systems through malicious package manipulation.