CVE-2018-14974 in QCMS
Summary
by MITRE
An issue was discovered in QCMS 3.0.1. upload/System/Controller/backend/news.php has XSS.
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Analysis
by VulDB Data Team • 03/13/2020
The vulnerability identified as CVE-2018-14974 represents a cross-site scripting flaw within the QCMS 3.0.1 content management system specifically affecting the backend news management component. This issue resides in the upload/System/Controller/backend/news.php file, which processes user input without proper sanitization or validation mechanisms. The flaw allows authenticated attackers with administrative privileges to inject malicious scripts into the system's news management interface, potentially compromising the entire backend environment.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding practices within the PHP-based backend controller. When administrators or authorized users interact with the news management functionality, the system fails to properly sanitize user-supplied data before rendering it in web responses. This creates an opportunity for attackers to inject malicious javascript code through form fields or parameters that are subsequently executed in the context of other users' browsers. The vulnerability is classified as a classic reflected cross-site scripting issue under CWE-79, which specifically addresses the improper sanitization of user-controllable data.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with potential access to sensitive administrative functions and user data. An attacker could leverage this flaw to steal session cookies, perform unauthorized actions within the CMS, or redirect users to malicious websites. The attack requires an authenticated user context, meaning that the vulnerability is most dangerous when combined with credential theft or privilege escalation attacks. This aligns with ATT&CK technique T1059.007 for scripting and T1566.001 for credential harvesting, as the XSS vulnerability enables further exploitation pathways.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application. The recommended approach includes sanitizing all user inputs using proper escaping techniques before rendering them in HTML contexts, implementing Content Security Policy headers to limit script execution, and conducting regular security audits of all backend controllers. Additionally, organizations should enforce strict access controls and implement multi-factor authentication for administrative accounts. The fix should involve updating the news.php controller to properly sanitize all user-supplied data and ensure that any dynamic content is rendered with appropriate HTML escaping mechanisms. Regular security testing and vulnerability assessments should be conducted to identify similar issues in other components of the CMS framework.