CVE-2023-48526 in Experience Manager
Summary
by MITRE • 12/15/2023
Adobe Experience Manager versions 6.5.18 and earlier are 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 • 01/05/2024
Adobe Experience Manager presents a critical reflected cross-site scripting vulnerability that affects versions 6.5.18 and earlier, creating a significant security risk for organizations relying on this content management platform. This vulnerability resides in the way the application processes user input through URL parameters, specifically when handling requests that are reflected back to users without proper sanitization or encoding mechanisms. The flaw allows an attacker to inject malicious JavaScript code that executes within the victim's browser context, potentially compromising user sessions and enabling further exploitation. The vulnerability is particularly concerning because it requires minimal user interaction to exploit, making it a prime target for social engineering campaigns where attackers craft malicious URLs designed to trigger the XSS condition when clicked by unsuspecting users. The reflected nature of the vulnerability means that the malicious payload is not stored on the server but rather injected through the request itself, making detection more challenging and the attack surface broader across various endpoints within the AEM application.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding practices within Adobe Experience Manager's web application framework. When user-supplied parameters are directly incorporated into HTTP responses without proper sanitization, the system becomes susceptible to XSS attacks. Attackers can craft URLs containing malicious JavaScript payloads that, when executed in a victim's browser, can perform actions such as stealing session cookies, redirecting users to malicious sites, or even modifying content within the application. This type of vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and represents a classic example of how insufficient input filtering can lead to severe security consequences. The impact is amplified by the fact that AEM is commonly used for enterprise content management, meaning that successful exploitation could provide attackers with access to sensitive business data, user credentials, or even administrative functions depending on the victim's privileges within the system.
The operational impact of this vulnerability extends beyond simple script execution, as it can serve as a stepping stone for more sophisticated attacks within the enterprise environment. Once an attacker successfully executes malicious code through XSS, they can leverage the compromised session to perform actions such as modifying content, accessing restricted areas, or even conducting privilege escalation attacks. The low-privileged nature of the attacker requirement means that even users with minimal access rights could potentially exploit this vulnerability to gain unauthorized access to sensitive information or disrupt business operations. Organizations using Adobe Experience Manager in production environments face significant risk as this vulnerability can be exploited through various attack vectors including phishing emails, compromised websites, or even through malicious advertisements that direct users to vulnerable AEM endpoints. The reflected nature of the attack makes it particularly dangerous because it can be delivered through multiple channels without requiring persistent storage on the target server, making it harder to detect and prevent through traditional security controls.
Organizations should implement immediate mitigations including applying the latest security patches released by Adobe to address this vulnerability, as well as implementing comprehensive input validation and output encoding mechanisms within their web applications. Security teams should conduct thorough vulnerability assessments to identify all potentially affected endpoints within their AEM installations and implement web application firewalls to filter malicious requests before they reach the application servers. Additionally, organizations should enhance their user education programs to reduce the likelihood of successful social engineering attacks that could exploit this vulnerability. The implementation of Content Security Policy headers can provide an additional layer of protection by restricting the sources from which scripts can be executed within the browser context. Regular security monitoring and log analysis should be implemented to detect potential exploitation attempts, and access controls should be reviewed to ensure that users have appropriate privileges to minimize the impact of potential successful attacks. This vulnerability demonstrates the critical importance of maintaining up-to-date security practices and the need for continuous monitoring of third-party applications to prevent exploitation through known vulnerabilities.