CVE-2023-29302 in Experience Manager
Summary
by MITRE • 06/15/2023
Adobe Experience Manager versions 6.5.16.0 (and earlier) is affected by a reflected Cross-Site Scripting (XSS) vulnerability. If a low-privileged attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser.
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Analysis
by VulDB Data Team • 12/09/2025
Adobe Experience Manager represents a comprehensive digital experience platform that serves as a cornerstone for enterprise web content management and digital marketing solutions. The platform's architecture includes numerous web interfaces and administrative components that handle user interactions through HTTP requests and responses. When vulnerabilities exist within these web-facing components, they can create significant security risks for organizations relying on the platform for their digital presence and customer engagement. The specific vulnerability in question affects the core web application functionality that processes user input through URL parameters, making it particularly dangerous in enterprise environments where administrators and content creators frequently interact with web-based interfaces. This vulnerability specifically impacts version 6.5.16.0 and earlier releases, indicating that the issue has existed for several years within the product lifecycle and has not been adequately addressed in the affected versions.
The reflected cross-site scripting vulnerability stems from improper input validation and output encoding within the AEM web application's request handling mechanisms. When user-supplied parameters are passed through URL query strings or form data to server-side processing functions, the application fails to adequately sanitize or encode these inputs before returning them to the user's browser. This occurs particularly in pages that dynamically generate content based on URL parameters, such as search results, error pages, or administrative interfaces that accept user input. The vulnerability manifests when a malicious actor crafts a URL containing specially crafted JavaScript code within a parameter value, which is then reflected back to the victim's browser without proper sanitization. The reflected nature of this vulnerability means that the malicious code does not need to be stored on the server, but rather injected through a crafted URL that the victim must visit. This creates a classic phishing attack vector where the attacker must successfully convince the victim to click on the malicious link, typically through social engineering or by embedding the link in compromised websites or email communications.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities within the victim's browser context. Low-privileged attackers can leverage this vulnerability to escalate their privileges by stealing session cookies, which can then be used to impersonate legitimate users within the AEM environment. This access can potentially allow attackers to modify content, create new user accounts, or access sensitive administrative interfaces. The vulnerability also enables attackers to perform actions such as viewing restricted content, modifying user permissions, or even executing arbitrary commands within the context of the victim's browser session. In enterprise environments where AEM is used for customer-facing websites, this vulnerability can result in data exfiltration, defacement of web content, or manipulation of customer interactions. The reflected nature of the attack means that successful exploitation requires user interaction, but this interaction can be automated through various social engineering techniques, making the vulnerability particularly dangerous in environments where users frequently click on links from unknown sources.
Organizations should implement immediate mitigation strategies to protect against this vulnerability, beginning with the urgent upgrade to Adobe Experience Manager version 6.5.16.1 or later, which contains the necessary patches to address the reflected XSS vulnerability. Network-based mitigations should include implementing web application firewalls that can detect and block malicious URL patterns, particularly those containing common XSS payload indicators such as script tags or javascript protocol handlers. Input validation should be strengthened at multiple levels, including client-side validation to prevent malformed parameters from reaching server-side processing functions, and server-side validation to ensure that all user-supplied input is properly sanitized before being processed or returned to users. Security monitoring should be enhanced to detect unusual patterns of URL access that may indicate attempted exploitation, particularly around administrative interfaces and content management functions. Additionally, organizations should implement user education programs to raise awareness about phishing attacks and the importance of verifying URLs before clicking on suspicious links. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws, and represents a classic example of how inadequate input validation and output encoding can create security vulnerabilities. From an ATT&CK perspective, this vulnerability maps to techniques involving initial access through malicious links and privilege escalation through session hijacking, making it a significant threat to enterprise security postures. Regular security assessments and penetration testing should be conducted to verify that the implemented mitigations are effective and to identify any additional vulnerabilities that may exist within the AEM environment.