CVE-2026-75720 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.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
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 for the execution of arbitrary JavaScript code within the security context of the vulnerable application. This type of vulnerability arises when an web application processes user-supplied data without proper validation or sanitization before updating the DOM environment dynamically. In this specific instance, the input handling mechanism fails to adequately escape special characters that have meaning in HTML and JavaScript contexts, thereby permitting malicious scripts to be injected into the page structure rather than being rendered as inert text content.
The technical nature of this flaw involves a failure to enforce strict output encoding or context-aware escaping when rendering user-controlled data within dynamic DOM elements. When an attacker crafts a webpage containing specially constructed input vectors, such as modified URL parameters, form fields, or injected HTML fragments, the vulnerable component interprets these inputs as executable code rather than static content. This misinterpretation occurs because the application trusts client-side input implicitly without verifying its integrity against expected formats or character sets. The vulnerability is rooted in a lack of robust input validation and insufficient output encoding strategies that are standard for preventing script injection attacks on modern web platforms.
Exploitation of this Adobe Experience Manager vulnerability requires active user interaction, specifically necessitating that the victim visits a maliciously crafted webpage controlled by an attacker. This dependency classifies the attack as passive or semi-passive in nature, relying on social engineering tactics to lure users into triggering the exploit vector. Once the victim accesses the crafted page, the embedded malicious script executes within their browser session under the same origin policy that governs Adobe Experience Manager. Consequently, the attacker gains the ability to read sensitive cookies, local storage data, or session tokens associated with the user's authenticated state against the application.
The operational impact of this vulnerability is significant for organizations relying on Adobe Experience Manager for content management and digital experience delivery. Successful exploitation can lead to account hijacking through session cookie theft, allowing attackers to impersonate legitimate users and gain unauthorized access to administrative functions or sensitive customer data. Furthermore, the attacker may 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 capture additional credentials. This compromises the confidentiality, integrity, and availability aspects of the application's security posture by undermining trust in client-side interactions.
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. The attack vector corresponds to ATT&CK technique T1059, specifically subtechnique 007 for JavaScript execution on the client side. Mitigation strategies should focus on implementing strict Content Security Policy headers that restrict script sources and prevent inline script execution where possible. Developers must also enforce rigorous input validation rules that reject unexpected characters and apply context-sensitive output encoding to all user-supplied data before it is rendered in the DOM. Regular security audits and static code analysis tools configured to detect XSS patterns are essential for identifying such flaws early in the development lifecycle.