CVE-2026-75640 in Experience Manager as a Cloud Service
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 Cross-Site Scripting vulnerability classified under CWE-79, which allows an attacker to inject and execute malicious JavaScript code within the context of the victim's browser. This specific flaw stems from insufficient validation or sanitization of user-supplied input that is subsequently written into the Document Object Model without proper encoding. The attack vector involves manipulating the DOM environment through a crafted webpage designed to trigger the vulnerable script execution when accessed by an authenticated user. Because the vulnerability operates entirely within the client-side browser context, it does not require server-side exploitation but relies heavily on social engineering or drive-by techniques to lure victims into visiting the malicious site.
The operational impact of this vulnerability is significant as it enables session hijacking, credential theft, and defacement of the application interface. By executing arbitrary JavaScript in the victim's security context, an attacker can bypass same-origin policy restrictions to access sensitive data stored in local storage or cookies associated with Adobe Experience Manager sessions. This capability allows for unauthorized actions such as modifying user profiles, stealing authentication tokens, or performing administrative functions if the compromised account possesses elevated privileges. The requirement for user interaction means that exploitation typically involves phishing campaigns where a victim is tricked into clicking a link to the attacker-controlled page containing the exploit payload.
From a threat intelligence perspective, this vulnerability aligns with ATT&CK technique T1059 which covers Command and Scripting Interpreter execution via browser-based methods. The change in scope indicates that previous assessments may have underestimated the ease of exploitation or the potential impact on session integrity. Mitigation strategies should focus on implementing robust Content Security Policy headers to restrict inline script execution and ensuring that all dynamic content is properly encoded before being rendered by the DOM. Additionally, developers must enforce strict input validation rules and utilize secure coding practices such as context-aware output encoding to prevent injection attacks. Regular security audits and penetration testing are recommended to identify similar client-side flaws in web applications built on Adobe Experience Manager platforms.