CVE-2026-75744 in Experience Manager Forms
Summary
by MITRE • 09/22/2026
Adobe Experience Manager Forms JEE is affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a high-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, potentially gaining elevated access or control over the victim's account or session. Scope is changed.
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Analysis
by VulDB Data Team • 09/22/2026
Adobe Experience Manager Forms JEE contains a stored Cross-Site Scripting vulnerability within its form processing components that allows high-privileged attackers to inject malicious JavaScript code into persistent data fields. Unlike reflected XSS, where the payload is delivered via a crafted link or request parameter and executed immediately upon viewing, this flaw involves the storage of the malicious script in the application's backend database or file system. When an authenticated user with sufficient privileges interacts with these vulnerable form fields during creation or modification, they can embed executable code that becomes part of the stored content. This architectural characteristic means the payload remains active on the server side until it is retrieved and rendered by a client browser, creating a persistent threat vector rather than a transient one.
The technical flaw stems from insufficient input validation and output encoding mechanisms within the JEE implementation of Adobe Experience Manager Forms. When user-supplied data is written to storage without proper sanitization, special characters such as angle brackets or script tags are preserved in their raw form. Subsequently, when this stored content is served back to users through standard HTTP responses, the browser interprets these embedded scripts as legitimate executable code rather than static text. This failure to enforce strict context-aware encoding allows attackers to bypass typical client-side protections and execute arbitrary JavaScript within the security context of the vulnerable application domain. The vulnerability specifically affects high-privileged accounts, which often have broader access rights and can influence data viewed by other users or system processes.
The operational impact of this vulnerability is significant due to its potential for widespread exploitation once a victim accesses the compromised page. An attacker who successfully injects malicious scripts can perform actions on behalf of the victim, including stealing session cookies, capturing sensitive form inputs such as credentials or personal identifiable information, and performing unauthorized administrative operations within the application. Because the script executes in the context of the Adobe Experience Manager domain, it may bypass same-origin policy restrictions, allowing access to internal APIs or other resources that are not directly accessible from external sites. This can lead to complete account takeover, data exfiltration, or further lateral movement within the network if the victim's session tokens provide access to additional systems. The change in scope indicates that this vulnerability is now recognized as having a broader impact than previously assessed, potentially affecting more components of the JEE deployment architecture.
Mitigation strategies must focus on both immediate remediation and long-term defensive posture improvements. Administrators should apply the latest security patches provided by Adobe for Adobe Experience Manager Forms JEE to address the underlying code flaws responsible for this injection vulnerability. In environments where patching is not immediately feasible, implementing a Web Application Firewall with rules capable of detecting and blocking stored XSS payloads in HTTP request bodies can provide an additional layer of defense. Furthermore, developers must enforce strict input validation on all form fields that accept user data, ensuring that only expected character sets are permitted. Output encoding should be applied consistently across all views to ensure that any dynamic content is rendered as plain text rather than executable code. Regular security audits and penetration testing focused on stored XSS vectors will help identify similar weaknesses before they can be exploited by malicious actors seeking elevated access or control over user sessions.