CVE-2026-75657 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.
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Analysis
by VulDB Data Team • 09/08/2026
Adobe Experience Manager contains a client-side Cross-Site Scripting vulnerability classified under CWE-79, which allows an attacker to inject and execute malicious JavaScript code within the context of the victim's browser. This specific implementation flaw stems from insufficient validation or sanitization of user-supplied input that is subsequently written into the Document Object Model without proper encoding. The vulnerability operates through a DOM-based attack vector where the script execution originates not from server-side processing but from client-side scripts reading untrusted data and writing it to an HTML element, thereby altering the page's behavior dynamically in real-time within the browser environment.
The operational impact of this flaw is significant as it enables attackers to bypass traditional network security controls that inspect HTTP traffic for malicious payloads, since the attack occurs entirely on the client side after the initial page load has completed successfully. By manipulating the DOM structure, an adversary can steal sensitive session cookies, hijack user sessions, perform actions on behalf of the victim, or redirect users to phishing sites designed to harvest credentials. The requirement for user interaction means that exploitation typically involves social engineering tactics where a victim is lured into visiting a specially crafted webpage containing malicious scripts embedded in URLs or form inputs that trigger the vulnerable code path upon rendering.
From an offensive security perspective, this vulnerability aligns with MITRE ATT&CK technique T1059 which covers Command and Scripting Interpreter execution via browser-based methods such as JavaScript injection. The change in scope indicates that the impact extends beyond simple data exfiltration to potentially affecting broader application functionality or enabling further lateral movement if combined with other vulnerabilities within the same domain context. Defenders must recognize that DOM XSS attacks are particularly dangerous because they do not leave traces on the server logs, making detection through standard web application firewalls more challenging without specialized client-side monitoring tools.
Mitigation strategies should focus on implementing strict input validation and output encoding mechanisms at every point where untrusted data is written to the DOM. Developers must utilize context-aware escaping functions provided by modern JavaScript frameworks or libraries that automatically handle sanitization, rather than relying on manual string manipulation which is prone to errors. Additionally, deploying a Content Security Policy with a nonces-based approach can significantly reduce the risk of successful exploitation by restricting the sources from which scripts are allowed to execute. Regular security code reviews and static application security testing focused specifically on DOM-based XSS patterns are essential for maintaining the integrity of Adobe Experience Manager deployments over time.