CVE-2026-75666 in Experience Manager as a Cloud Service
Summary
by MITRE • 09/08/2026
Adobe Experience Manager is affected by a DOM-based Cross-Site Scripting (XSS) vulnerability. An attacker could exploit this issue by manipulating the DOM environment to execute malicious JavaScript within the context of the victim's browser. Exploitation of this issue requires user interaction in that a victim must visit a crafted webpage. Scope is changed.
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Analysis
by VulDB Data Team • 09/08/2026
Adobe Experience Manager contains a client-side vulnerability classified as a Document Object Model based Cross-Site Scripting flaw, which allows an attacker to inject and execute malicious JavaScript code within the context of a victim's web browser session. This type of vulnerability arises when an application processes user-supplied input without adequate validation or sanitization before rendering it into the DOM structure. In this specific instance, the Adobe Experience Manager interface fails to properly neutralize special characters that are used in HTML tags or attributes, enabling the injection of executable scripts through manipulated inputs such as URL parameters, form fields, or other data sources that influence the page's dynamic content generation process.
The operational impact of this vulnerability is significant because it fundamentally alters the security scope from a server-side issue to a client-side attack vector. By exploiting this flaw, an attacker can bypass traditional network perimeter defenses and directly interact with the victim's browser environment. This capability allows for session hijacking, where the attacker steals authentication cookies or tokens to impersonate the legitimate user. It also facilitates credential theft through fake login forms injected into the page content, keylogging capabilities that capture sensitive data entered by the victim, and defacement of the application interface to spread malware or phishing attempts. The requirement for user interaction means the attack typically relies on social engineering tactics, such as sending a crafted link via email or instant message, which tricks the victim into visiting a malicious webpage designed to trigger the exploit within their active Adobe Experience Manager session.
From an industry standards perspective, this vulnerability aligns with CWE-79, known as Improper Neutralization of Input During Web Page Generation commonly referred to as Cross-site Scripting. The attack methodology corresponds to ATT&CK technique T1059, specifically sub-technique 007 for JavaScript execution on the client side. Understanding these mappings helps in categorizing the risk within broader security frameworks and ensures that mitigation strategies address both the immediate technical flaw and the underlying behavioral patterns associated with client-side script injection attacks.
To mitigate this vulnerability, Adobe Experience Manager administrators should ensure that all software components are updated to the latest patched versions provided by Adobe, as these updates typically include input validation fixes and output encoding mechanisms designed to prevent DOM manipulation exploits. Additionally, implementing a Content Security Policy header can significantly reduce the impact of successful XSS attempts by restricting the sources from which scripts can be loaded and executed within the browser environment. Developers should also adopt secure coding practices that emphasize strict input sanitization on both client and server sides, ensuring that any data rendered into the DOM is properly encoded to prevent interpretation as executable code rather than plain text. Regular security audits and penetration testing focused on cross-site scripting vectors are recommended to identify similar weaknesses before they can be exploited in production environments.