CVE-2026-75701 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 how the application processes untrusted input within the browser environment. This specific weakness arises from an improper neutralization of script-related HTML tags or attributes that are used in web pages, allowing malicious scripts to be injected directly into the DOM structure rather than being properly escaped or validated before rendering. The technical flaw lies in the failure of the client-side application logic to adequately sanitize user-supplied data when it is written back into the document object model using methods such as innerHTML or similar dynamic content insertion techniques without appropriate context-aware encoding. This architectural oversight permits an attacker to inject executable JavaScript code that becomes part of the page's runtime environment, effectively bypassing traditional server-side security controls because the execution occurs entirely within the victim's browser instance after the initial request has been processed and served by Adobe Experience Manager.
The operational impact of this vulnerability is significant as it enables a remote attacker to execute arbitrary scripts in the context of the vulnerable application, thereby compromising the confidentiality, integrity, and availability of user data associated with that session. By manipulating the DOM environment, an adversary can steal sensitive authentication tokens, session cookies, or personally identifiable information stored within local storage or accessed via JavaScript APIs. Furthermore, this capability allows for account takeover attacks where the attacker assumes the identity of a legitimate user by hijacking their active sessions, potentially leading to unauthorized administrative actions if the compromised account possesses elevated privileges within Adobe Experience Manager. The requirement for user interaction means that exploitation typically relies on social engineering tactics such as phishing emails or malicious links embedded in web pages, compelling the victim to visit a crafted webpage where the exploit payload is hosted and triggered upon page load or specific user interactions like clicking elements.
From an industry standard perspective, this vulnerability aligns with CWE-79, which defines Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting, specifically falling under the sub-category for DOM-based XSS where the script is executed due to modifications in the DOM environment rather than direct server-side injection. In terms of tactical mapping within the MITRE ATT&CK framework, this exploit scenario corresponds to T1059 Command and Control scripting techniques used during initial access or persistence phases, as well as T1204 User Execution which highlights the necessity for victim interaction. The change in scope indicates that while previous iterations might have required more complex server-side interactions, this particular flaw leverages client-side processing errors, expanding the attack surface to include any user who interacts with compromised content linked from or hosted by Adobe Experience Manager interfaces.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements within the development lifecycle of Adobe Experience Manager components. Immediate actions should involve applying vendor-provided security patches that address the specific input validation gaps in the affected versions, ensuring that all dynamic content insertion points are reviewed for proper encoding practices such as context-aware HTML entity encoding or JavaScript string escaping depending on where the data is being inserted. Developers must implement strict Content Security Policy headers to restrict the sources from which scripts can be loaded and executed, thereby mitigating the impact of successful XSS attacks by preventing inline script execution unless explicitly whitelisted. Additionally, adopting a secure coding framework that emphasizes input validation at both entry points and output rendering stages will reduce the likelihood of similar DOM-based vulnerabilities emerging in future updates. Regular security audits using automated static analysis tools combined with manual penetration testing focused on client-side logic flaws are essential to maintain robust defense-in-depth against these persistent web application threats.