CVE-2026-75707 in Experience Manager as a Cloud Service
Summary
by MITRE • 09/09/2026
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 • 09/09/2026
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 specific type of vulnerability arises from improper validation or sanitization of user-supplied input that is subsequently used in dynamic HTML generation without proper encoding. The core technical failure lies in the application's handling of data flows where untrusted sources are written to sensitive DOM locations, such as innerHTML, document.write, or attribute setters, bypassing standard security controls like Content Security Policy if not strictly enforced by the browser configuration.
The operational impact of this vulnerability is significant because it enables an attacker to hijack user sessions, steal sensitive cookies and authentication tokens, deface web pages, or redirect users to malicious sites that may deploy further malware. Since the attack vector relies on DOM manipulation rather than server-side processing, traditional network-based intrusion detection systems often fail to detect the exploit in transit. The vulnerability requires active user interaction for successful exploitation, meaning an attacker must lure a victim to visit a specially crafted webpage containing the malicious script payload. This social engineering component is critical as it shifts the burden of initial access from remote code execution capabilities to persuasive deception tactics targeting end-users who trust or are unaware of the risks associated with external links or embedded content.
From a classification perspective, this vulnerability aligns closely with CWE-79, which describes Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. Furthermore, in terms of tactical behavior within the MITRE ATT&CK framework for Enterprise and Mobile environments, this exploit maps to T1059 Command and Control scripting techniques, specifically JavaScript execution, and potentially T1204 User Execution if it involves tricking a user into clicking a link or opening an attachment that triggers the DOM manipulation. The change in scope noted indicates that previous assessments may have underestimated the reach of this flaw, recognizing now that client-side state can be compromised directly through browser environment manipulation rather than just server-side data corruption.
Mitigation strategies for Adobe Experience Manager administrators involve several layers of defense. First and foremost is the implementation of strict Content Security Policy headers to restrict the sources from which scripts can be loaded and executed, thereby neutralizing many DOM-based XSS payloads even if they are injected into the page structure. Additionally, developers must ensure that all dynamic content insertion uses safe APIs such as textContent or createElement with proper encoding functions rather than innerHTML when dealing with untrusted data. Input validation should be applied at both the client-side and server-side levels to reject malformed requests before they reach the rendering engine. Regular security audits focusing on JavaScript code paths and third-party library integrations are essential to identify similar patterns of unsafe DOM manipulation across the application suite.