CVE-2026-75717 in Experience Manager
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 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 type of injection occurs when an application takes data from an attacker-controlled source and sends it to a sink that executes JavaScript without proper validation or encoding. In this instance, the flaw resides in the way Adobe Experience Manager handles dynamic content updates on the client side, allowing malicious scripts to be injected into the DOM tree during runtime rather than through static HTML injection. This architectural weakness means that traditional server-side input filtering may not fully mitigate the risk if the application relies heavily on JavaScript frameworks or libraries that manipulate the DOM directly based on URL parameters, fragment identifiers, or other dynamic inputs provided by external sources.
The operational impact of this vulnerability is significant because it allows an attacker to execute arbitrary JavaScript code within the security context of the victim's browser session for Adobe Experience Manager. This capability effectively grants the attacker full control over the user interface and data flow presented to the legitimate user. By manipulating the DOM environment, a malicious actor can steal sensitive authentication tokens, such as session cookies or JSON Web Tokens, which are often stored in local storage or accessible via JavaScript APIs. Furthermore, this vulnerability enables credential harvesting through fake login forms that mimic the authentic Adobe Experience Manager interface, keylogging of keystrokes to capture usernames and passwords, and redirection of users to phishing sites designed to compromise additional systems within the enterprise network. The scope change noted indicates that the impact extends beyond simple defacement or alert boxes, potentially affecting the integrity and confidentiality of administrative actions performed by authenticated users who interact with the compromised interface.
Exploitation of this vulnerability requires active user interaction, specifically necessitating that a victim visits a crafted webpage controlled by the attacker. This social engineering component is crucial to the attack chain, as it relies on tricking an authorized administrator or content editor into clicking a malicious link or loading a page containing exploit code. Once the victim accesses the crafted resource, the injected script executes automatically within their browser session, leveraging any existing privileges associated with that user account. The requirement for user interaction does not diminish the severity of the risk; rather, it highlights the importance of secure coding practices and robust input validation mechanisms to prevent such manipulation even when external links are involved. Attackers often combine this technique with other social engineering tactics or exploit kits to increase the likelihood of successful compromise, making it a persistent threat in environments where Adobe Experience Manager is used for managing sensitive digital assets.
To mitigate this vulnerability, organizations must implement strict output encoding and context-aware escaping techniques whenever user-supplied data is rendered into HTML attributes, JavaScript variables, or DOM properties. Developers should utilize Content Security Policy headers to restrict the sources from which scripts can be loaded, thereby preventing the execution of injected malicious code even if it manages to enter the page structure. Additionally, adopting a whitelist approach for input validation ensures that only expected and safe data formats are processed by the application logic. Adobe has released patches addressing this issue in subsequent updates to Experience Manager, making immediate patching essential for all affected instances. Security teams should also monitor browser console logs for unusual script execution patterns and conduct regular code reviews focusing on client-side JavaScript handling of dynamic inputs to identify similar DOM-based XSS weaknesses before they can be exploited by adversaries targeting the platform.