CVE-2026-75659 in Experience Manager
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 vulnerability classified as a Document Object Model based Cross-Site Scripting flaw, which allows an attacker to inject and execute malicious JavaScript code within the context of a victim's web browser session. This specific type of vulnerability arises when an application processes user-supplied input without proper validation or encoding before writing it back into the DOM structure that is subsequently rendered by the browser engine. The core technical failure lies in the insufficient sanitization of data sources, such as URL parameters, form inputs, or other dynamic content streams, which are directly reflected or used to construct HTML elements without adequate escaping mechanisms. This lack of input validation enables the injection of script tags or event handlers that bypass standard security controls because the browser interprets the injected code as legitimate part of the page's execution context rather than external data.
The operational impact of this vulnerability is significant, particularly given its reliance on user interaction for exploitation. An attacker must craft a malicious webpage containing specific payloads designed to trigger the vulnerable script within Adobe Experience Manager interfaces when accessed by an authenticated or targeted victim. Once the victim visits the crafted page and interacts with the affected component, the injected JavaScript executes in the security context of the target domain. This allows the attacker to perform actions such as stealing session cookies, hijacking user sessions, performing unauthorized administrative actions on behalf of the victim, defacing web content, or redirecting users to phishing sites. The scope change noted indicates that the impact extends beyond simple data exfiltration and may involve broader system compromise depending on the privileges held by the affected user account within the Adobe Experience Manager environment.
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 is categorized under ATT&CK technique T1059, specifically Command and Scripting Interpretation via JavaScript, leveraging the browser's native execution capabilities to achieve malicious objectives. This classification highlights that the primary defense mechanism failure occurs at the input validation stage where untrusted data is treated as executable code rather than safe text content. The requirement for user interaction places this in a social engineering context, often requiring phishing campaigns or lure-based attacks to deliver the crafted payload effectively.
Mitigation strategies must focus on implementing robust output encoding and strict input validation protocols within the Adobe Experience Manager application logic. Developers should ensure that all dynamic data inserted into the DOM is properly encoded using context-aware methods such as HTML entity encoding for text content, attribute escaping for attributes, or URL encoding for query parameters. Utilizing Content Security Policy headers can also help mitigate the impact by restricting the sources from which scripts are allowed to load and execute, thereby preventing inline script execution even if injection occurs. Additionally, keeping Adobe Experience Manager updated with the latest security patches provided by Adobe is critical as these updates typically include fixes for such input validation flaws. Organizations should also enforce least privilege principles for user accounts accessing the system to limit the potential damage of a successful session hijacking or unauthorized action scenario.