CVE-2026-75660 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 • 09/09/2026
Adobe Experience Manager contains a client-side vulnerability classified as a Document Object Model based Cross-Site Scripting flaw, which allows for the execution of arbitrary JavaScript code within the security context of the vulnerable application. This specific type of injection occurs when an application processes user-supplied data without proper validation or encoding before updating the DOM environment dynamically. In this instance, the vulnerability stems from insufficient sanitization of input parameters that are subsequently reflected into the HTML document structure via unsafe methods such as innerHTML or similar DOM manipulation APIs. The core technical flaw lies in the failure to distinguish between trusted and untrusted data sources during runtime processing, thereby permitting malicious scripts to be injected directly into the browser's execution context rather than being treated as inert text content.
The operational impact of this vulnerability is significant because it enables an attacker to bypass same-origin policy restrictions by executing code that appears to originate from the legitimate Adobe Experience Manager domain. Once a victim visits a crafted webpage containing the malicious payload, typically delivered through social engineering or drive-by download techniques, the browser interprets and executes the injected JavaScript as if it were part of the original application. This allows for session hijacking where attackers can steal authentication cookies or tokens, keylogging to capture sensitive user input such as credentials or financial data, defacement of the web interface, or redirection to phishing sites designed to harvest further information. The scope change noted in the description indicates that while traditional server-side XSS might be limited by output encoding, this client-side variant operates entirely within the browser sandbox but leverages the trust relationship between the user and the application domain to achieve full control over the local session state.
From a classification perspective, this vulnerability aligns with CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting, specifically under subcategories related to DOM-based injection vectors. It also maps closely to MITRE ATT&CK technique T1059 Command and Scripting Interpreter where JavaScript is used for execution on the client side, often preceding further lateral movement or data exfiltration in a broader attack chain. The requirement for user interaction means that automated exploitation at scale is less likely compared to server-side vulnerabilities, but it remains highly effective against targeted attacks involving phishing campaigns or compromised third-party scripts embedded within legitimate pages.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Developers should implement strict input validation using allowlists for expected character sets rather than relying solely on blocklists which can be bypassed through encoding tricks. Output encoding is critical, ensuring that all dynamic content inserted into the DOM is properly escaped according to HTML entity standards or context-specific rules such as URL encoding when used in href attributes. Utilizing Content Security Policy headers with a strict nonce-based script policy can significantly reduce the impact by preventing unauthorized scripts from executing even if they are injected into the page structure. Additionally, adopting modern frontend frameworks that automatically handle DOM escaping and avoid direct innerHTML manipulation where possible provides a robust defense against these types of client-side injection flaws. Regular security code reviews focusing on data flow analysis to trace user inputs through application logic until their final rendering point will help identify similar vulnerabilities before they reach production environments.