CVE-2023-43342 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 Languages Menu component.
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Analysis
by VulDB Data Team • 02/05/2026
The CVE-2023-43342 vulnerability represents a critical cross-site scripting flaw within the opensolution Quick CMS version 6.7 that exposes the system to malicious code execution through the Languages Menu component. This vulnerability specifically targets the CMS's input validation mechanisms, creating a pathway for local attackers to inject malicious scripts that can persist and execute within the context of user sessions. The flaw exists in the way the application processes and renders user-supplied data within the Languages Menu functionality, which serves as a critical interface point for content management operations.
The technical implementation of this vulnerability stems from insufficient input sanitization and output encoding within the CMS's language management module. When administrators or users interact with the Languages Menu component, the application fails to properly validate or escape potentially malicious input strings that could contain script tags or other executable code. This weakness aligns with CWE-79, which specifically addresses cross-site scripting vulnerabilities where applications fail to properly encode output data. The vulnerability's classification as a local attack vector indicates that the malicious actor must already have some level of access to the system, though this access can be relatively minimal given the nature of the flaw.
The operational impact of this vulnerability extends beyond simple script injection, as it allows attackers to execute arbitrary code within the context of the CMS environment. This capability can lead to complete system compromise, data exfiltration, and unauthorized access to sensitive information stored within the CMS database. The persistent nature of XSS vulnerabilities means that once exploited, malicious scripts can remain active until manually removed, potentially affecting all users who access the compromised system. Attackers can leverage this vulnerability to establish backdoors, modify content, steal session cookies, or perform privilege escalation attacks against the CMS infrastructure.
Security professionals should implement multiple layers of mitigation strategies to address this vulnerability effectively. The primary remediation approach involves applying the vendor-provided security patch or upgrade to the CMS to version 6.8 or later, which contains the necessary input validation and output encoding fixes. Additionally, implementing proper input sanitization routines within the Languages Menu component will help prevent malicious payloads from being processed. Network-based protections such as web application firewalls can provide additional defense-in-depth measures, though these should not be considered a substitute for proper code-level fixes. Organizations should also conduct comprehensive security assessments of their CMS installations, focusing on input validation mechanisms across all components. The ATT&CK framework categorizes this vulnerability under T1566, which addresses the exploitation of vulnerabilities in applications, with potential lateral movement capabilities once initial access is achieved. Regular security monitoring and log analysis should be implemented to detect suspicious activities related to language menu modifications, as these may indicate exploitation attempts.