CVE-2026-60028 in Quix Page Builder Pro Plugin
Summary
by MITRE • 07/20/2026
The Joomla extension Quix Page Builder Pro is vulnerable to an authenticated stored XSS vulnerability. Authenticated builder user could inject scripts, fires for any visitor or admin viewing the page. Unescaped output + unsanitised SVG.
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Analysis
by VulDB Data Team • 07/21/2026
The vulnerability in the Joomla extension Quix Page Builder Pro represents a critical authenticated stored cross-site scripting flaw that undermines the security posture of websites utilizing this component. This weakness exists within the extension's handling of user-generated content, specifically when processing SVG elements and rendering them on web pages without proper sanitization or output escaping mechanisms. The vulnerability affects all users who have access to the Quix builder interface, making it particularly dangerous as it can be exploited by malicious actors who gain legitimate access to administrative accounts or user privileges within the Joomla environment.
The technical implementation of this flaw stems from insufficient input validation and output sanitization practices within the extension's codebase. When administrators or content creators use the Quix builder to incorporate SVG graphics into their web pages, the system fails to properly sanitize the SVG content before storing it in the database. Additionally, the extension does not employ adequate output escaping mechanisms when rendering these stored SVG elements back to users browsing the website. This combination creates a persistent XSS vector where malicious scripts can be injected during content creation and subsequently executed whenever any visitor or administrator views the affected pages. The vulnerability is classified as authenticated because it requires a valid user session within the Joomla system, but once exploited, it can affect all users who encounter the compromised content.
The operational impact of this vulnerability extends far beyond simple script execution, potentially enabling attackers to escalate privileges, steal session cookies, perform unauthorized administrative actions, or redirect users to malicious websites. Since the XSS is stored in the database rather than reflected in URL parameters, the attack persists even after the initial injection point, making it particularly insidious and difficult to detect through routine security scanning. Any user with access to the Quix builder interface can exploit this vulnerability, which means that compromised accounts or insider threats could be leveraged to compromise entire websites. The attack surface is broad as any page containing SVG content created through the Quix interface becomes a potential infection point, affecting both public-facing websites and internal administrative interfaces.
Security practitioners should implement multiple layers of mitigation strategies to address this vulnerability effectively. Immediate remediation requires updating the Quix Page Builder Pro extension to the latest version that includes proper input sanitization and output escaping for SVG content. Organizations must also consider implementing web application firewalls with XSS detection capabilities, content security policies to restrict script execution, and regular security audits of third-party Joomla extensions. The vulnerability aligns with CWE-79 (Cross-site Scripting) and follows patterns commonly associated with ATT&CK technique T1059.001 (Command and Scripting Interpreter: PowerShell), as attackers could leverage the XSS to execute malicious commands or scripts within user browsers. Additionally, the flaw demonstrates characteristics of ATT&CK technique T1548.002 (Abuse Elevation Control Mechanism: Bypass User Access Controls) when exploited by authenticated users to gain broader access than intended. Regular monitoring and log analysis should be implemented to detect potential exploitation attempts, while security awareness training for administrators can help prevent unauthorized access that might lead to this vulnerability being exploited.
Organizations utilizing Joomla platforms with Quix Page Builder Pro should prioritize patching this vulnerability immediately, as the stored nature of the XSS means that successful exploitation can have long-lasting consequences for website security. The combination of authenticated access requirements and persistent script injection creates a particularly dangerous threat vector that could enable comprehensive compromise of affected websites. Security teams must also consider implementing additional defensive measures such as regular penetration testing, database monitoring for unauthorized content modifications, and comprehensive vulnerability scanning of all installed Joomla extensions to identify similar weaknesses that may exist in other components of the web application stack.