CVE-2026-75691 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.
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 critical client-side security flaw classified as a Document Object Model-based Cross-Site Scripting vulnerability, commonly referred to as DOM XSS. This type of vulnerability differs from traditional reflected or stored XSS because the malicious script execution does not involve server-side processing of user input in the conventional sense. Instead, it arises when an application reads data from the current document's DOM and passes that unsafe data to a sink function without proper validation or sanitization. In this specific instance within Adobe Experience Manager, the internal logic fails to adequately sanitize dynamic content before injecting it into the browser environment, allowing external inputs to alter the structure of the web page in unintended ways.
The technical mechanism behind this flaw relies on the manipulation of the DOM by an attacker who crafts a malicious webpage containing specially designed JavaScript code or HTML elements that interact with vulnerable properties within Adobe Experience Manager interfaces. When a victim interacts with the system and visits this crafted location, potentially through social engineering tactics such as phishing links or compromised legitimate sites, the browser executes the injected script in the context of the trusted domain hosting Adobe Experience Manager. This bypasses same-origin policy protections because the code runs under the authority of the vulnerable application itself rather than an external origin. The scope change noted indicates that this vulnerability may allow access to sensitive data or actions beyond what was previously possible, potentially escalating from a simple script execution to broader session hijacking or administrative privilege abuse depending on the victim's role within the system.
From an operational perspective, the impact of exploiting this DOM-based XSS is severe and multifaceted. Attackers can steal authentication cookies, session tokens, or other sensitive user data stored in local storage or accessed via JavaScript APIs. This enables unauthorized access to user accounts, leading to potential data breaches where confidential enterprise information managed by Adobe Experience Manager could be exfiltrated. Furthermore, the attacker can perform actions on behalf of the victim without their knowledge, such as modifying content settings, changing administrative configurations, or redirecting users to malicious sites for further exploitation like credential harvesting. The requirement for user interaction means that while automated remote code execution is not possible, targeted attacks against specific employees or administrators remain highly feasible and dangerous within an enterprise environment.
This vulnerability aligns with CWE-79, which covers Improper Neutralization of Input During Web Page Generation known as Cross-site Scripting, specifically the DOM-based variant described in CWE-813. In terms of offensive security frameworks, this exploitation technique maps to MITRE ATT&CK tactic T1059 Command and Control under subtechnique JavaScript Execution, where attackers use browser-side scripting to maintain persistence or execute payloads within a trusted context. It also relates to TA0006 Credential Access via techniques like Steal Web Session Cookie if the script is designed to exfiltrate session identifiers. Understanding these mappings helps security teams prioritize remediation efforts based on established industry standards for vulnerability classification and threat modeling.
To mitigate this risk, Adobe must implement strict input validation and output encoding strategies that ensure all dynamic data inserted into the DOM is properly sanitized against HTML entities and JavaScript special characters. Developers should avoid using dangerous sinks such as innerHTML, outerHTML, or document.write with unsanitized user-controlled data. Instead, they should utilize safer alternatives like textContent for setting content or use frameworks that automatically escape output by default. For administrators currently running affected versions of Adobe Experience Manager, immediate patching to the latest security release is essential. Additionally, implementing a Content Security Policy (CSP) can significantly reduce the impact of successful XSS attacks by restricting the sources from which scripts are allowed to load and execute, thereby preventing the injection of unauthorized external scripts even if the DOM manipulation occurs. Regular security audits focusing on client-side code paths that handle user input will further harden the application against similar future exploits.