CVE-2026-75661 in Experience Manager 6.5
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 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 code without proper validation or encoding. In this instance, the flaw resides in the client-side logic where user-supplied data is directly manipulated into the DOM structure, allowing for the execution of arbitrary JavaScript commands within the security context of the vulnerable web page. This represents a significant deviation from secure coding practices regarding input sanitization and output encoding, creating an attack vector that bypasses server-side protections by operating entirely on the client side where traditional perimeter defenses are often ineffective.
The operational impact of this vulnerability is severe because it enables attackers to hijack user sessions, deface websites, or redirect victims to malicious sites through the execution of arbitrary code in the victim's browser context. Since the scope has been changed and requires user interaction, exploitation relies on social engineering tactics where a victim must be induced to visit a specially crafted webpage containing the malicious payload. Once accessed, the attacker can steal sensitive information such as session cookies or authentication tokens, perform actions on behalf of the authenticated user, or install malware by leveraging other browser vulnerabilities that may exist in the environment. This compromises the confidentiality and integrity of the system for any user who interacts with the compromised page while logged into Adobe Experience Manager.
From a standards perspective, this vulnerability aligns closely with CWE-79, which describes Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. The specific mechanism falls under subcategories involving DOM-based XSS where the script is executed due to modifications in the DOM environment rather than through server-side rendering errors. In terms of adversary tactics and techniques, this exploitation method maps directly to MITRE ATT&CK technique T1059 Command and Scripting Interpreter with a focus on JavaScript execution within web browsers. It also relates to T1189 Drive-by Compromise if the crafted page is hosted on compromised infrastructure designed to automatically trigger the exploit upon visit without further user action beyond navigation, although the current description specifies that explicit interaction or visiting of the crafted page is required.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Adobe has released patches for this vulnerability which should be applied immediately by system administrators to update the affected components of Adobe Experience Manager. For developers involved in custom integrations, it is essential to implement strict input validation and output encoding mechanisms that ensure all data rendered into the DOM is properly sanitized according to context-specific rules. Additionally, deploying Content Security Policy headers can significantly reduce the impact of successful XSS attacks by restricting the sources from which scripts are allowed to load or execute. Regular security audits focusing on client-side code paths and automated static analysis tools configured to detect DOM-based sinks should be integrated into the development lifecycle to prevent similar flaws in future releases.