CVE-2025-64588 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 • 09/09/2026
Adobe Experience Manager contains a stored Cross-Site Scripting vulnerability within its content management and form processing subsystems, specifically affecting how user-supplied data is rendered back into web pages without adequate sanitization or encoding. This flaw allows an attacker with low-privileged access to inject malicious JavaScript code directly into vulnerable form fields during the initial submission phase. Unlike reflected XSS where the payload is delivered via a crafted link, stored XSS persists on the target server because the injected script becomes part of the page content itself. Consequently, every user who subsequently views or interacts with the affected page will have their browser execute the malicious script in the context of the vulnerable application domain.
The technical mechanism behind this vulnerability involves insufficient input validation and output encoding within the Adobe Experience Manager interface components that handle dynamic form data. When a low-privileged attacker submits a form containing specially crafted HTML or JavaScript payloads, the system fails to properly escape special characters such as angle brackets, quotes, and ampersands before storing the content in its database or rendering it back to other users. This lack of proper context-aware encoding allows the browser's parser to interpret the injected data as executable code rather than static text. The scope change mentioned indicates that this vulnerability may affect a broader range of components or user roles than previously documented, potentially including areas where administrative functions are exposed through standard web interfaces.
The operational impact of this stored XSS flaw is significant because it enables session hijacking, credential theft, and unauthorized actions performed on behalf of the victim user. By executing scripts in the context of the Adobe Experience Manager domain, an attacker can access sensitive cookies containing authentication tokens, read confidential content managed by the platform, or manipulate the DOM to redirect users to phishing sites. Since the payload is stored server-side, it does not require social engineering tricks like sending malicious links; instead, any legitimate user accessing the compromised page becomes a victim automatically. This persistence makes detection and remediation more challenging as the threat remains active until the underlying code flaw is patched or the specific content entries are manually removed from the system.
Mitigation strategies should focus on both immediate containment and long-term architectural fixes. Administrators must ensure that Adobe Experience Manager is updated to the latest security release provided by Adobe, which includes patches for this specific input validation deficiency. In environments where patching cannot be applied immediately, implementing a Web Application Firewall with rules capable of detecting and blocking common XSS payloads in form submissions can provide an additional layer of defense. Furthermore, developers should enforce strict output encoding based on the context in which data is rendered, ensuring that all user-supplied content is treated as untrusted text rather than executable code. Regular security audits focusing on input validation logic across all public-facing forms are essential to prevent similar vulnerabilities from being introduced or exploited in the future.
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 ATT&CK technique T1059 which covers Command and Scripting Interpreter execution via browser-based attacks. Understanding these mappings helps security teams prioritize remediation efforts based on standardized threat intelligence frameworks while ensuring that the specific implementation flaws in Adobe Experience Manager are addressed comprehensively rather than through superficial workarounds.