CVE-2026-110078 in Experience Manager
Summary
by MITRE • 10/13/2026
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 • 10/13/2026
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 the attack vector from server-rendered content to dynamic browser environment manipulation. This specific type of cross-site scripting allows an attacker to inject malicious scripts into web pages viewed by other users by exploiting how the application handles user-supplied input within the DOM structure rather than through direct HTTP request parameters or server-side template injection. The vulnerability arises because the application fails to adequately sanitize, validate, or encode data before it is processed and rendered in the browser context, allowing untrusted script sources to be executed with the privileges of the authenticated session associated with that user account.
The technical mechanism behind this flaw involves an attacker crafting a malicious webpage designed to interact with Adobe Experience Manager interfaces or components where input fields are dynamically reflected into the DOM without proper encoding. When a victim visits this crafted page, often through social engineering tactics such as phishing links or embedded content in third-party sites, their browser processes the injected payload within the context of the vulnerable application's domain. This results in the execution of arbitrary JavaScript code that operates under the same security policies and permissions as legitimate scripts loaded by Adobe Experience Manager, effectively bypassing standard cross-origin restrictions due to the shared origin policy inherent in DOM-based attacks where the malicious script runs on the victim’s machine but within the trusted context of the target application.
The operational impact of this vulnerability is severe because it enables attackers to perform a wide range of hostile actions against affected users without requiring any server-side compromise or database manipulation. Once the malicious JavaScript executes, an attacker can steal sensitive session cookies and authentication tokens, allowing them to hijack user sessions and impersonate legitimate administrators or content authors within the Adobe Experience Manager environment. Furthermore, the attacker could manipulate page contents in real-time to deceive victims into entering credentials on fake login forms, redirect users to phishing sites, or exfiltrate confidential data displayed on the screen such as proprietary business documents or customer information stored within the digital experience platform. This capability undermines the integrity and confidentiality guarantees provided by the application’s authentication and access control mechanisms.
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 falling under subcategories related to DOM-based XSS where the source is client-side script rather than server response data. In terms of adversary tactics and techniques, this exploitation method maps directly to MITRE ATT&CK technique T1059, Command and Control via Browser Proxy or similar browser-based execution vectors, as well as T1204, User Execution, since it relies on the victim visiting a malicious webpage initiated by social engineering. The shift in scope noted in the vulnerability description indicates that previous mitigations may have focused solely on server-side input validation, leaving client-side DOM manipulation paths unguarded against script injection attacks.
To mitigate this risk, organizations must implement strict Content Security Policy headers to restrict the sources from which scripts can be loaded and executed within Adobe Experience Manager instances, thereby preventing the execution of injected inline scripts or unauthorized external resources. Developers should also enforce rigorous input validation and output encoding strategies that specifically address DOM manipulation functions such as innerHTML, document.write, and eval, ensuring that all user-supplied data is treated as plain text rather than executable code before being inserted into the DOM tree. Additionally, enabling HTTP-only flags on session cookies can prevent JavaScript from accessing sensitive cookie values, reducing the impact of potential session hijacking even if an XSS attack succeeds in executing malicious scripts within the browser context.