CVE-2018-14976 in QCMS
Summary
by MITRE
An issue was discovered in QCMS 3.0.1. upload/System/Controller/backend/category.php has XSS.
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Analysis
by VulDB Data Team • 03/13/2020
The vulnerability identified as CVE-2018-14976 represents a cross-site scripting flaw within the QCMS 3.0.1 content management system specifically in the backend category management controller. This issue resides in the file upload/System/Controller/backend/category.php which processes user inputs related to category management operations. The flaw occurs when the application fails to properly sanitize or escape user-supplied data before incorporating it into dynamically generated web pages, creating an avenue for malicious actors to inject client-side scripts.
This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a critical security weakness in web applications. The flaw enables attackers to execute arbitrary JavaScript code within the context of other users' browsers, potentially leading to session hijacking, data theft, or further exploitation of the affected system. The attack vector specifically targets the backend administrative interface where authorized users manage content categories, making it particularly dangerous as it could be leveraged by authenticated attackers to escalate privileges or compromise the entire CMS infrastructure.
The operational impact of this vulnerability extends beyond simple script execution as it can be exploited to perform session manipulation attacks, redirect users to malicious websites, or extract sensitive information from authenticated sessions. When an administrator or authorized user visits a page containing the malicious payload, the injected scripts execute automatically in their browser context, potentially allowing attackers to steal cookies, modify content, or even gain complete control over the administrative interface. The vulnerability demonstrates poor input validation practices and inadequate output encoding mechanisms that are fundamental to preventing XSS attacks.
Mitigation strategies for this vulnerability should focus on implementing proper input sanitization and output encoding throughout the application. The recommended approach involves validating all user inputs against strict whitelists, escaping special characters in output rendering, and implementing Content Security Policies to limit script execution. Additionally, the affected QCMS version should be immediately updated to a patched release that addresses the XSS vulnerability, as the manufacturer likely released security updates specifically targeting this flaw. Organizations should also consider implementing web application firewalls and regular security assessments to identify similar vulnerabilities in their web applications, following the ATT&CK framework's guidance on preventing and detecting web-based attacks through proper input validation and output encoding techniques.