CVE-2025-64854 in Experience Manager as a Cloud Service
Summary
by MITRE • 09/08/2026
Adobe Experience Manager is affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim's browser when they browse to the page containing the vulnerable field. Scope is changed.
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Analysis
by VulDB Data Team • 09/08/2026
Adobe Experience Manager contains a stored Cross-Site Scripting vulnerability within its form handling components, which allows attackers with low-privileged accounts to inject malicious client-side scripts into persistent data fields. Unlike reflected XSS where the payload is delivered via a link or request parameter that executes immediately upon viewing, this flaw resides in how the application stores and subsequently renders user-supplied input without adequate sanitization or encoding. When an authenticated attacker submits a form containing specially crafted JavaScript code, the system accepts and saves this content as part of its data structure rather than rejecting it based on security policies designed to prevent script injection.
The operational impact arises when other users with appropriate access levels view pages that display these compromised fields. Because the malicious scripts are stored server-side or in a persistent database associated with the application state, they are served back to every victim who accesses the affected content. This transforms the attack from a targeted incident into a potentially widespread compromise, as any user interacting with the vulnerable form interface will have their browser execute the injected code within the security context of the Adobe Experience Manager domain. The scope expansion noted in reports indicates that this vulnerability may affect broader areas of the application than previously documented, increasing the surface area for exploitation across different modules and interfaces managed by the platform.
From a technical classification perspective, this flaw aligns with CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. The specific mechanism involves insufficient validation of input data before it is stored in persistent storage and later rendered to end-users without proper context-aware encoding. This failure allows the browser to interpret malicious markup or script tags as executable code rather than plain text, bypassing standard security controls that rely on distinguishing between content and commands within the HTML document object model.
In terms of adversary tactics, this vulnerability supports techniques categorized under MITRE ATT&CK ID T1059 Command and Scripting Interpreter through browser-based execution environments such as JavaScript engines. Attackers can leverage this capability to perform session hijacking by stealing authentication cookies or tokens stored in local storage, conduct phishing campaigns by injecting deceptive login forms into legitimate pages, or deface the user interface to damage organizational reputation. The persistence of the payload means that remediation requires not only patching the underlying code but also purging any existing malicious entries from the database to prevent continued exposure for users who have already accessed the compromised content.
Mitigation strategies should prioritize applying the latest security patches provided by Adobe, which typically include input validation enhancements and output encoding improvements within the affected form components. Administrators must ensure that all instances of Adobe Experience Manager are updated to versions where this specific vector has been addressed in the release notes. Additionally, implementing a Content Security Policy header can provide an additional layer of defense by restricting the sources from which scripts are allowed to execute, thereby limiting the impact even if some malicious content manages to bypass input filters. Regular auditing of form inputs and monitoring for anomalous script execution patterns in browser consoles or network traffic logs can also help detect ongoing exploitation attempts before significant damage occurs.