CVE-2026-75639 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. This type of vulnerability arises when an application processes user-supplied input without proper validation or sanitization before updating the DOM environment dynamically. In this specific instance, the Adobe Experience Manager interface fails to adequately restrict the types of data that can be manipulated through client-side scripts, creating an entry point for malicious actors to alter the behavior of the web page in unintended ways. The core technical flaw lies in the insufficient filtering or encoding of input parameters that are subsequently reflected or used within dynamic content generation processes, allowing script tags and event handlers to execute rather than being treated as inert data.
The operational impact of this vulnerability is significant because it enables an attacker to bypass same-origin policy restrictions inherent to modern web browsers. By successfully exploiting this flaw, a malicious actor can steal sensitive session cookies, capture authentication tokens, or hijack the user's active sessions with Adobe Experience Manager. Furthermore, the attacker could perform actions on behalf of the victim, such as modifying content settings, exfiltrating confidential documents stored within the system, or redirecting the user to phishing sites designed to harvest additional credentials. The requirement for user interaction means that exploitation typically involves social engineering tactics where a victim is lured into visiting a specially crafted webpage containing the malicious payload. This dependency on human action does not diminish the severity but rather shifts the attack vector from automated remote code execution to targeted, interactive exploits often seen in spear-phishing campaigns or drive-by download scenarios involving compromised advertising networks.
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 the DOM-based subcategory where the script originates from the client-side environment rather than server-generated content. In terms of offensive security frameworks, this exploit maps to MITRE ATT&CK technique T1059, Command and Control via Browser Proxy or Extension, particularly when used for data exfiltration, as well as T1204, User Execution, which highlights the necessity of tricking a user into initiating the malicious action. Understanding these mappings helps security teams prioritize remediation efforts based on established industry standards for vulnerability management and threat intelligence correlation.
To mitigate this risk, Adobe Experience Manager administrators should ensure that all software components are updated to the latest versions provided by Adobe, as patches typically include enhanced input validation logic and stricter content security policies. Implementing a robust Content Security Policy is critical; specifically, configuring strict directives such as script-src with nonces or hashes can prevent unauthorized scripts from executing even if they manage to inject themselves into the DOM. Additionally, developers should employ context-aware output encoding for all dynamic data inserted into HTML elements, attributes, and JavaScript variables. Utilizing modern web frameworks that automatically escape user input by default can significantly reduce the attack surface. Security teams must also monitor browser console logs for unusual script execution patterns and deploy Web Application Firewalls configured to detect DOM-based XSS signatures in real-time traffic flows.