CVE-2026-75709 in Experience Manager as a Cloud Service
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.
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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 an attacker to inject and execute malicious JavaScript code within the context of a victim's web browser session. This type of vulnerability arises when an application processes user-supplied input without adequate validation or sanitization before writing it back into the DOM environment. In this specific instance, the Adobe Experience Manager interface fails to properly neutralize special characters that are used in HTML tags or attributes, thereby enabling the execution of arbitrary script code. The core technical flaw lies in the insufficient handling of dynamic content updates where user-controlled data is directly reflected or written into the page structure without escaping dangerous payloads such as event handlers or script blocks.
The operational impact of this vulnerability is significant because it compromises the confidentiality and integrity of the victim's session within the Adobe Experience Manager environment. By successfully exploiting this flaw, an attacker can bypass same-origin policy restrictions to access sensitive data stored in cookies, local storage, or other browser-stored credentials associated with the application. This capability allows for account hijacking, where the attacker assumes the identity of a legitimate user, potentially leading to unauthorized modifications of content within the experience management system. Furthermore, the malicious script can perform actions on behalf of the victim without their knowledge, such as submitting forms, changing settings, or redirecting the user to phishing sites designed to steal additional credentials.
Exploitation of this vulnerability requires active user interaction, specifically necessitating that a victim visits a specially crafted webpage controlled by the attacker. This reliance on social engineering means that the attack vector is primarily web-based and depends on tricking users into clicking malicious links or loading compromised pages while authenticated with Adobe Experience Manager. The scope change indicates that the impact extends beyond simple data theft to potentially affecting other applications running in the same browser context if shared storage mechanisms are exploited, although the primary target remains the specific session of the victim using the affected application version.
To mitigate this risk, organizations should implement strict input validation and output encoding strategies within their web applications to ensure that all user-supplied data is treated as untrusted until properly sanitized. While Adobe provides patches for these vulnerabilities in updated versions of Experience Manager, immediate mitigation involves ensuring users are running the latest stable release which includes fixes for DOM-based XSS flaws. Additionally, deploying Content Security Policy headers can help mitigate the impact by restricting the sources from which scripts can be loaded and executed, thereby reducing the effectiveness of injected malicious code even if it manages to bypass initial validation checks. Regular security audits and penetration testing focused on client-side vulnerabilities are recommended to identify similar weaknesses before they can be exploited in production environments. This vulnerability aligns with CWE-79, known as Improper Neutralization of Input During Web Page Generation commonly referred to as Cross-site Scripting, and maps to the ATT&CK technique T1059 which covers Command and Scripting Interpreter execution via browser-based vectors.