CVE-2026-75713 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 critical client-side security flaw classified as a Document Object Model based Cross-Site Scripting vulnerability, which fundamentally alters the traditional scope of attack by shifting focus from server-side injection to browser-side manipulation. This specific type of XSS occurs when an application receives untrusted data and uses it to dynamically construct part or all of a DOM element without properly validating or encoding that input before rendering it in the web page context. In this instance, the vulnerability resides within the client-side logic of Adobe Experience Manager, allowing an attacker to inject malicious JavaScript code directly into the browser's execution environment by manipulating how the application processes user-supplied data during runtime operations rather than through static HTML injection points.
The technical mechanism behind this flaw involves a failure in input validation and output encoding practices within the web application framework used by Adobe Experience Manager. When a victim interacts with a crafted webpage or component that triggers the vulnerable code path, the browser parses the injected script as executable content because it is treated as part of the DOM structure rather than plain text data. This allows the malicious payload to execute immediately in the context of the trusted domain associated with Adobe Experience Manager, effectively bypassing same-origin policy protections and granting the attacker full access to all cookies, session tokens, local storage contents, and other sensitive information stored by the browser for that specific site.
From an operational perspective, this vulnerability poses a severe risk because it requires user interaction, specifically necessitating that a victim visit a specially crafted webpage or click on a malicious link designed to trigger the DOM manipulation. While this requirement adds a layer of social engineering complexity compared to fully automated server-side exploits, it significantly lowers the barrier for targeted attacks such as spear-phishing campaigns where an attacker can craft deceptive content tailored to specific users within an organization. Once executed, the malicious script can perform actions on behalf of the victim, including stealing authentication credentials, hijacking active sessions, performing unauthorized administrative actions within Adobe Experience Manager if the user has elevated privileges, or redirecting the user to phishing sites designed to harvest further sensitive information.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-79, which describes Improper Neutralization of Input During Web Page Generation known as Cross-site Scripting, specifically falling under the subcategory for DOM-based XSS where the script is executed due to modifications in the DOM environment by untrusted data rather than direct server-side injection. In terms of tactical classification within the MITRE ATT&CK framework, this exploit maps to T1059 Command and Control Execution via Browser or Scripting Interpreter, as it leverages native browser capabilities to execute arbitrary code, and potentially T1204 User Execution if the attack relies on tricking a user into initiating the action through social engineering.
To mitigate this risk, organizations must implement strict Content Security Policy headers that restrict the sources from which scripts can be loaded and executed, thereby preventing inline script execution unless explicitly whitelisted for specific trusted functionalities. Developers should also enforce rigorous input validation by sanitizing all dynamic data before it is used to update DOM elements using established libraries designed for this purpose rather than relying on native browser methods like innerHTML without proper encoding. Additionally, enabling HTTP-only flags on session cookies ensures that even if JavaScript execution occurs, the attacker cannot easily exfiltrate sensitive authentication tokens stored in those cookies. Regular security assessments and code reviews focusing on client-side data handling practices are essential to identify and remediate similar DOM manipulation flaws before they can be exploited in production environments.