CVE-2016-4168 in Experience Manager
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Adobe Experience Manager 5.6.1, 6.0, and 6.1 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 09/13/2022
The CVE-2016-4168 vulnerability represents a critical cross-site scripting flaw discovered in Adobe Experience Manager versions 5.6.1, 6.0, and 6.1. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security flaws. The vulnerability allows remote attackers to inject malicious web scripts or HTML content into the application, potentially compromising user sessions and data integrity. Adobe Experience Manager serves as a comprehensive content management platform that powers numerous enterprise websites and digital experiences, making this vulnerability particularly concerning from a security perspective. The unspecified vectors indicate that the attack could occur through multiple entry points within the application's interface, including but not limited to form inputs, URL parameters, or user-generated content fields. The vulnerability's classification as remote means that attackers do not require physical access or authentication to exploit the flaw, significantly expanding the attack surface and potential impact.
The technical exploitation of this XSS vulnerability occurs when the application fails to properly validate or sanitize user input before rendering it in web pages. In Adobe Experience Manager's case, the flaw likely exists in how the application processes and displays user-supplied content without adequate output encoding or sanitization mechanisms. Attackers can craft malicious payloads that, when executed, can steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users. The vulnerability's presence in multiple versions suggests a fundamental flaw in the application's input handling logic that was not properly addressed across the affected releases. This type of vulnerability directly violates security principles outlined in the OWASP Top Ten, specifically the A03:2021-Injection category, where inadequate input validation leads to code execution vulnerabilities. The attack vector could leverage reflected or stored XSS techniques, depending on how the application processes the malicious input, making the impact potentially severe for organizations relying on these AEM versions for their digital presence.
The operational impact of CVE-2016-4168 extends beyond simple script injection, as it can enable sophisticated attacks that compromise entire web applications and user data. Organizations using affected Adobe Experience Manager versions face significant risk of data breaches, where attackers can harvest user credentials, session tokens, and sensitive information from authenticated users. The vulnerability could be exploited to perform privilege escalation attacks, allowing unauthenticated attackers to gain access to administrative functions within the content management system. This poses a particular risk for enterprises that use AEM for managing sensitive customer data, employee information, or proprietary business content. The attack could also facilitate phishing campaigns where users are redirected to malicious sites that appear legitimate, or enable the deployment of malware through browser-based exploits. From an ATT&CK framework perspective, this vulnerability maps to T1059.007 Command and Scripting Interpreter: JavaScript, as attackers leverage JavaScript injection to compromise systems. The impact is further amplified by the fact that AEM is often used for corporate websites, making successful exploitation potentially damaging to brand reputation and regulatory compliance.
Mitigation strategies for CVE-2016-4168 should prioritize immediate patching of affected Adobe Experience Manager installations to the latest security updates provided by Adobe. Organizations must implement comprehensive input validation and output encoding mechanisms across all user-facing application components, ensuring that all user-supplied data is properly sanitized before processing or display. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to prevent execution of unauthorized scripts. Security teams should conduct thorough vulnerability assessments to identify any custom components or extensions that might be vulnerable to similar injection flaws. Regular security testing including dynamic application security testing and manual penetration testing should be implemented to detect potential XSS vulnerabilities in custom code. Organizations should also establish robust monitoring and logging mechanisms to detect suspicious activities that might indicate exploitation attempts. The remediation process must include comprehensive testing to ensure that security updates do not introduce regressions in application functionality, particularly for features that rely heavily on user-generated content or rich text editing capabilities. Additionally, implementing web application firewalls and security-aware development practices can provide additional protection layers against similar vulnerabilities in the future.