CVE-2023-43346 in Quick
Summary
by MITRE • 10/25/2023
Cross-site scripting (XSS) vulnerability in opensolution Quick CMS v.6.7 allows a local attacker to execute arbitrary code via a crafted script to the Backend - Dashboard parameter in the Languages Menu component.
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Analysis
by VulDB Data Team • 02/05/2026
This cross-site scripting vulnerability exists within the opensolution Quick CMS version 6.7, specifically targeting the Backend Dashboard parameter within the Languages Menu component. The flaw represents a classic stored XSS attack vector that enables local attackers to inject malicious scripts into the application's backend interface. The vulnerability stems from insufficient input validation and output sanitization mechanisms within the language menu handling code, allowing attackers to manipulate the dashboard parameter with crafted script payloads. The attack requires local access to the system, making it particularly dangerous as it bypasses typical network-based security controls and operates within the trusted backend environment. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws in web applications.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with potential access to sensitive administrative functions and data within the CMS backend. Successful exploitation could enable attackers to modify website content, steal administrative credentials, manipulate user sessions, or even escalate privileges within the CMS environment. The local attacker requirement suggests this vulnerability might be exploited through compromised user accounts or insider threats, though it could also represent a privilege escalation vector from less privileged local users to administrative access. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1059 for command and scripting interpreter and T1548 for abuse of privileges, as attackers could leverage the XSS to execute arbitrary commands within the CMS context.
Mitigation strategies should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's backend components. The immediate fix requires sanitizing all user inputs to the Languages Menu component and ensuring proper HTML encoding of dynamic content before rendering in the dashboard interface. Security headers including Content Security Policy should be implemented to prevent unauthorized script execution, while regular security audits should verify that similar vulnerabilities do not exist in other backend components. Input validation should follow the principle of least privilege, rejecting any input that contains potentially malicious script tags or JavaScript execution patterns. Additionally, implementing proper access controls and monitoring for unusual administrative activities can help detect exploitation attempts, while regular security updates and vulnerability assessments should be conducted to identify and remediate similar issues across the entire CMS codebase. The vulnerability underscores the importance of secure coding practices and the need for comprehensive security testing of all backend administrative interfaces.