CVE-2022-4614 in znote-app
Summary
by MITRE • 12/19/2022
Cross-site Scripting (XSS) - Stored in GitHub repository alagrede/znote-app prior to 1.7.11.
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Analysis
by VulDB Data Team • 01/21/2023
The vulnerability identified as CVE-2022-4614 represents a stored cross-site scripting flaw within the alagrede/znote-app GitHub repository, affecting versions prior to 1.7.11. This repository appears to be a web application framework or content management system that handles user input through various interface components. The stored nature of this XSS vulnerability indicates that malicious script code can be permanently injected into the application's database or storage mechanisms, where it persists and executes whenever users access affected pages. This type of vulnerability allows attackers to compromise user sessions and potentially gain unauthorized access to sensitive data or system resources.
The technical implementation of this flaw likely involves insufficient input validation and output encoding within the application's data handling processes. When user-supplied data is accepted through forms, comments, or other input mechanisms without proper sanitization, the application fails to escape or encode special characters that could be interpreted as executable script code. The vulnerability manifests when this unvalidated data is subsequently rendered back to users in web pages, creating an environment where malicious JavaScript code can execute in the context of other users' browsers. This stored XSS vulnerability operates under CWE-79 which categorizes improper neutralization of input during web page generation as a fundamental weakness in web application security.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the capability to perform session hijacking, deface web interfaces, steal cookies, and potentially escalate privileges within the application. Attackers can craft malicious payloads that exploit the stored XSS to redirect users to malicious domains, inject malicious content, or harvest sensitive information such as session tokens or personal data. The persistent nature of stored XSS means that once the malicious code is injected, it affects all users who view the affected content until the vulnerability is patched and the malicious data is removed from the application's storage systems. This vulnerability directly aligns with ATT&CK technique T1531 which focuses on use of malicious code and T1566 which addresses credential access through social engineering and malicious code delivery.
Mitigation strategies for this vulnerability require immediate implementation of proper input validation and output encoding mechanisms throughout the application's codebase. The recommended approach involves implementing strict sanitization of all user-supplied input data before storage, combined with appropriate HTML encoding of output data when rendering content to users. Additionally, implementing content security policies, using secure coding practices, and conducting regular security audits can significantly reduce the risk of similar vulnerabilities. Organizations should also consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts. The patching process should be prioritized to upgrade to version 1.7.11 or later, which contains the necessary fixes to address the stored XSS vulnerability and prevent malicious script injection attacks.