CVE-2026-75669 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 critical client-side security flaw classified as a Document Object Model-based Cross-Site Scripting vulnerability, which fundamentally alters the traditional scope of exploitation by shifting focus from server-side injection to browser environment manipulation. This specific type of cross-site scripting allows an attacker to inject malicious scripts into web pages viewed by other users without the need for direct access to the application's backend infrastructure or database. The core technical flaw lies in the improper validation and sanitization of user-supplied input within the client-side JavaScript code, where data is written back to the DOM using unsafe methods that do not escape special characters effectively. This oversight enables the execution of arbitrary JavaScript commands directly within the context of the victim's browser session, bypassing many traditional server-side security controls because the attack vector operates entirely on the client side after the page has loaded.
The operational impact of this vulnerability is significant due to its potential for data theft and session hijacking. When a user interacts with a crafted webpage or link that triggers the vulnerable code path in Adobe Experience Manager, the malicious script executes immediately within the trusted domain context. This allows the attacker to access sensitive cookies, local storage items, and other authentication tokens associated with the victim's active session. Consequently, an adversary can impersonate the legitimate user, perform actions on their behalf such as modifying content or changing settings within the experience management platform, and exfiltrate confidential data stored in the browser environment. The requirement for user interaction means that social engineering tactics are often necessary to lure victims into visiting the malicious payload, but once triggered, the exploitation is automated and immediate.
From a classification perspective, this vulnerability aligns with CWE-79, which describes Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. Specifically, it falls under DOM-based XSS where the source of the data is within the browser's JavaScript environment rather than server-generated HTML. In terms of offensive security frameworks, this attack vector maps to MITRE ATT&CK technique T1059, Command and Scripting Interpreter, specifically through client-side script execution like ECMAScript or JavaScript. It also relates to T1189 Drive-by Compromise if the exploitation occurs via a compromised website that redirects users to the vulnerable Adobe Experience Manager instance with malicious parameters embedded in the URL or form data.
Mitigation strategies for this vulnerability require both immediate technical fixes and long-term architectural improvements. Developers must implement strict input validation on all user-supplied data before it is processed by client-side scripts, ensuring that only expected character sets are accepted. Output encoding should be applied consistently whenever dynamic content is inserted into the DOM using methods like innerHTML or document.write; instead, safer alternatives such as textContent or createElement with appendChild should be utilized to prevent script interpretation. Additionally, implementing a Content Security Policy header can significantly reduce the impact of successful XSS attacks by restricting the sources from which scripts are allowed to load and execute, thereby preventing inline script execution and unauthorized external resource loading. Regular security audits focusing on client-side code paths and automated static analysis tools configured for DOM-based vulnerability detection are essential to identify and remediate similar flaws before they can be exploited in production environments.