CVE-2026-106629 in Experience Manager
Summary
by MITRE • 10/13/2026
Adobe Experience Manager is affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by an 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 • 10/13/2026
Adobe Experience Manager contains a stored Cross-Site Scripting vulnerability within its form handling components that allows an attacker to inject malicious JavaScript code into persistent data fields. Unlike reflected XSS where the payload is delivered via a URL, this flaw resides in how the application processes and subsequently renders user-supplied input without adequate sanitization or encoding. When a victim with appropriate privileges accesses a page containing these compromised forms, the browser interprets the injected script as legitimate content from the trusted domain. This execution context enables the attacker to bypass same-origin policy restrictions, effectively allowing client-side code to interact directly with the application's Document Object Model and session cookies.
The operational impact of this vulnerability is significant because it facilitates account takeover and privilege escalation within the Adobe Experience Manager environment. An adversary can exploit this flaw to steal sensitive user credentials, hijack active sessions by exfiltrating authentication tokens or cookies, and perform actions on behalf of the victim such as modifying content configurations or accessing restricted administrative areas. Since the payload is stored server-side, it affects every user who views the affected page, creating a persistent threat vector that does not require social engineering to trigger beyond initial access to the vulnerable interface. This persistence distinguishes it from transient attacks and increases the likelihood of successful exploitation against multiple targets over time.
From a classification perspective, this vulnerability aligns with CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. The specific nature of storing malicious input for later retrieval places it firmly within the stored XSS category rather than reflected or DOM-based variants. In terms of adversary tactics, this exploit maps to the ATT&CK technique T1059 Command and Scripting Interpreter where JavaScript is used on the client side, as well as T1078 Valid Accounts which describes gaining access through compromised credentials obtained via session hijacking. The ability to execute arbitrary scripts in a trusted context represents a fundamental breach of web application security principles regarding input validation and output encoding.
Mitigation strategies must focus on implementing robust input validation and strict output encoding mechanisms within the Adobe Experience Manager form processing logic. Developers should ensure that all user-supplied data is sanitized against known malicious patterns before storage and rigorously encoded when rendered in HTML contexts to prevent browser interpretation of script tags or event handlers. Additionally, deploying Content Security Policy headers can significantly reduce the impact by restricting the sources from which scripts are allowed to execute, thereby neutralizing many injection attempts even if they bypass initial filters. Regular security audits and penetration testing focused on form fields and data persistence layers are essential to identify similar weaknesses before they can be exploited in production environments.