CVE-2025-64838 in Experience Manager
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 • 09/09/2026
Adobe Experience Manager contains a stored Cross-Site Scripting vulnerability within its form handling components, specifically affecting how user-supplied data is processed and rendered back to clients without adequate sanitization or encoding. This flaw allows an attacker with low-privileged access levels to inject malicious JavaScript code into vulnerable input fields on the platform. Unlike reflected XSS where the payload is delivered via a crafted link, stored XSS persists within the application's database or backend storage. Consequently, every time a legitimate user accesses the affected page containing the compromised form field, their browser executes the injected script automatically. This persistence mechanism significantly amplifies the attack surface because it does not require social engineering to trick users into clicking specific links; rather, victimization occurs simply through normal interaction with the application interface.
The operational impact of this vulnerability is severe due to its potential for widespread compromise within an organization's digital ecosystem. Once executed in a user's browser context, the malicious script operates under the same privileges and permissions as the authenticated session of that user. This enables attackers to perform actions such as stealing sensitive cookies or session tokens, which can lead to account takeover and unauthorized access to restricted areas of Adobe Experience Manager. Furthermore, the attacker may manipulate page content, deface web pages, redirect users to malicious sites hosting further malware, or harvest credentials through phishing overlays disguised within the legitimate interface. The scope change noted in recent advisories indicates that this vulnerability affects a broader range of components than previously understood, increasing the likelihood of exploitation across different modules and configurations of the platform.
From a classification perspective, this issue aligns with CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. The specific nature of storing user input without proper validation maps directly to CWE-80 Persistent Cross-Site Scripting within the Common Weakness Enumeration framework. In terms of adversary tactics and techniques, this vulnerability facilitates execution via browser-based mechanisms consistent with MITRE ATT&CK technique T1059 Command and Control or potentially data exfiltration through T1005 Data from Local System depending on the payload's intent. The low-privilege requirement for exploitation means that even compromised guest accounts or users with minimal permissions can serve as vectors, highlighting a critical gap in input validation logic at the application layer rather than relying solely on network-level access controls.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. Adobe has released patches addressing this specific flaw, and administrators should prioritize applying these updates to all affected instances of Adobe Experience Manager immediately. Beyond patching, organizations should implement strict input validation and output encoding practices within custom components or integrations that interact with form data. Utilizing Content Security Policy headers can also help mitigate the impact by restricting the sources from which scripts are allowed to execute, thereby preventing many stored XSS payloads from running even if they are successfully injected into the DOM. Regular security audits focusing on how user input is handled across all forms and text fields will further reduce the risk of similar vulnerabilities emerging in other parts of the application stack.