CVE-2016-7882 in Experience Manager
Summary
by MITRE
Adobe Experience Manager versions 6.2 and earlier have an input validation issue in the WCMDebug filter that could be used in cross-site scripting attacks.
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Analysis
by VulDB Data Team • 10/08/2022
Adobe Experience Manager suffers from a critical input validation vulnerability in its WCMDebug filter component affecting versions 6.2 and earlier. This flaw represents a classic cross-site scripting vulnerability that allows attackers to inject malicious scripts into web applications through improperly validated user input. The WCMDebug filter serves as a debugging mechanism within the Adobe Experience Manager platform, providing developers with detailed information about web content management processes. However, the insufficient validation of input parameters within this filter creates an exploitable entry point where malicious actors can craft specially crafted requests containing script code that gets executed in the context of other users' browsers.
The technical nature of this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications. The vulnerability occurs when user-supplied data enters the application without proper sanitization or encoding, allowing attackers to inject malicious payloads that execute in the victim's browser. In the context of Adobe Experience Manager, this means that any input parameter processed by the WCMDebug filter could potentially serve as an attack vector. Attackers typically exploit such vulnerabilities by crafting malicious URLs or form submissions that contain script tags or other executable code, which then gets rendered on the page and executed when other users access the affected content.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including session hijacking, data theft, and unauthorized access to sensitive content management systems. Given that Adobe Experience Manager is widely used for enterprise content management and digital publishing, successful exploitation could compromise entire web applications and potentially lead to broader system infiltration. The vulnerability affects the core functionality of the debugging filter, which is typically enabled in development environments but may inadvertently remain active in production systems, creating persistent attack surfaces.
Organizations should implement immediate mitigations including disabling the WCMDebug filter in production environments, applying the latest security patches from Adobe, and implementing comprehensive input validation across all user-facing components. Network-level protections such as web application firewalls can help detect and block malicious payloads, while application-level defenses should focus on proper output encoding and strict input sanitization. The ATT&CK framework categorizes this vulnerability under T1203, which covers exploitation of web application vulnerabilities, and T1566, which addresses social engineering through malicious web content. Regular security assessments and penetration testing should be conducted to identify similar input validation issues throughout the Adobe Experience Manager platform and related applications.