CVE-2025-64866 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, 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 crafted link or URL parameter, this flaw resides in how the application stores and subsequently renders user-supplied input without adequate sanitization or encoding. When an attacker submits a form containing specially crafted JavaScript code, the system accepts and saves this content as part of the page's data structure rather than treating it strictly as text. This persistence is critical because the malicious payload does not require immediate exploitation through social engineering to trigger; instead, it waits in the database until another user interacts with the affected interface element.
The operational impact arises when a victim with higher privileges or different access levels views the page containing the vulnerable form field. As the browser parses and renders the HTML content returned by Adobe Experience Manager, it interprets the injected script as executable code rather than static text. This execution occurs within the security context of the authenticated user's session, granting the attacker the ability to perform actions on behalf of that victim. The scope expansion noted in reports indicates that this vulnerability may allow access beyond initial expectations, potentially enabling attackers to steal sensitive cookies, capture keystrokes, or manipulate page content dynamically. Because the script executes automatically upon page load for any viewer, it facilitates automated attacks against multiple targets without further interaction from the attacker after the initial injection.
From a classification perspective, this flaw aligns with CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting and specifically falls under Stored XSS variants where data is saved to a server database or file system before being served back to users. In terms of adversary behavior mapping within the MITRE ATT&CK framework, this vulnerability supports techniques associated with Client-side Injection such as T1059 which covers execution of scripts on victim systems through browser-based vectors like HTML injection. The low-privilege requirement for exploitation makes it particularly dangerous in enterprise environments where many users have basic access rights but can still impact the security posture by compromising higher-level accounts that view their submissions or shared content.
Mitigation strategies must focus on both immediate remediation and long-term defensive coding practices. Adobe has released patches addressing this specific vulnerability, so applying the latest updates to Adobe Experience Manager instances is the primary defense mechanism for administrators. Beyond patching, developers should implement strict input validation and output encoding mechanisms that ensure all user-supplied data is treated as plain text when rendered in HTML contexts. Utilizing Content Security Policy headers can also help mitigate the impact by restricting where scripts are allowed to load from and preventing inline script execution even if injection occurs. Regular security audits of form handling logic and automated static analysis tools configured to detect XSS patterns will further reduce the risk of similar vulnerabilities being introduced into custom components or extensions within the platform.