CVE-2018-7274 in Quarx
Summary
by MITRE
Yab Quarx through 2.4.3 is prone to multiple persistent cross-site scripting vulnerabilities: Blog (Title), FAQ (Question), Pages (Title), Widgets (Name), and Menus (Name).
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Analysis
by VulDB Data Team • 06/21/2026
The vulnerability identified as CVE-2018-7274 affects Yab Quarx content management system versions up to 2.4.3, exposing multiple persistent cross-site scripting flaws that can be exploited by attackers to execute malicious scripts in the context of affected users' browsers. This vulnerability impacts several core components of the platform including Blog functionality where the Title field is susceptible, FAQ sections through the Question field, Pages management via the Title field, Widgets through the Name field, and Menus using the Name field. The persistent nature of these vulnerabilities means that malicious scripts injected through these input fields will remain stored on the server and executed whenever users access the affected content, creating a sustained attack vector that can compromise user sessions and data.
The technical flaw stems from inadequate input validation and output sanitization within the Yab Quarx application's data handling processes. When administrators or users input data into the identified fields, the system fails to properly sanitize or escape special characters that could be interpreted as HTML or JavaScript code. This vulnerability aligns with CWE-79, which specifically addresses Cross-Site Scripting flaws in software applications. The weakness occurs at the point of data entry and storage, where user-supplied content is not adequately filtered before being rendered back to users, creating opportunities for attackers to inject malicious payloads that persist across user sessions.
The operational impact of CVE-2018-7274 extends beyond simple script execution, as it can enable attackers to perform session hijacking, steal sensitive user credentials, manipulate content displayed to other users, and potentially escalate privileges within the affected system. Attackers can craft malicious input that, when stored and subsequently viewed by other users, executes scripts that can capture cookies, redirect users to malicious sites, or modify the application's behavior. This persistent XSS vulnerability creates a significant risk for organizations relying on Yab Quarx for content management, as the attack surface remains active even after the initial injection, allowing for ongoing exploitation and potential data breaches.
Mitigation strategies for this vulnerability should include immediate implementation of proper input validation and output encoding across all user-supplied fields within the affected components. Organizations should apply the latest security patches provided by Yab Quarx developers, as this vulnerability has been addressed in subsequent releases. Additionally, implementing Content Security Policy headers can help reduce the impact of successful XSS attacks by restricting script execution from unauthorized sources. Regular security audits and input sanitization testing should be conducted to ensure that similar vulnerabilities do not exist in other application components, following established security frameworks such as those outlined in the OWASP Top Ten and MITRE ATT&CK framework for web application security.