CVE-2026-107305 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 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 • 10/13/2026
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. When an attacker submits a specially crafted script through a vulnerable form field, the content is saved to the backend storage associated with that specific entry or record. This persistence mechanism means that every time any authorized user views the affected page containing this data, the browser parses and executes the embedded JavaScript code as part of the normal rendering process for that view.
The operational impact of this vulnerability extends beyond simple script execution, fundamentally altering the scope of potential attacks from a single-session interaction to a persistent threat vector. Because the malicious payload is stored on the server, it does not require complex social engineering or phishing links to trigger; simply accessing the page where the compromised data is displayed is sufficient for exploitation. This characteristic significantly lowers the barrier for entry for low-privileged users who may have limited direct access but can influence the experience of other users with higher privileges or different roles within the system. The attacker gains the ability to execute arbitrary JavaScript in the context of the victim's browser session, which typically includes authentication cookies and tokens associated with Adobe Experience Manager.
From a technical perspective, this flaw aligns closely with CWE-79, known as Improper Neutralization of Input During Web Page Generation commonly referred to as Cross-site Scripting. The vulnerability arises because the application fails to properly validate or encode special characters such as angle brackets, quotes, and ampersands before storing them in a database or content repository that is later rendered without escaping. This lack of output encoding allows the browser's parser to interpret the injected strings as executable code rather than plain text data. The persistence aspect also relates to CWE-83, where stored input leads to unintended execution upon retrieval, creating a long-term security risk within the application environment.
The consequences of successful exploitation are severe and multifaceted. An attacker can hijack user sessions by stealing session cookies or authentication tokens, potentially escalating privileges if they capture credentials for an administrative account. They may also perform actions on behalf of the victim, such as modifying content settings, deleting records, or changing configuration parameters within Adobe Experience Manager. Furthermore, the injected script could redirect users to malicious external sites designed to phish sensitive information or distribute malware. In enterprise environments where Adobe Experience Manager serves as a central hub for digital assets and customer interactions, this type of vulnerability can compromise data integrity and trust in the platform's security posture.
Mitigation strategies must address both immediate remediation and long-term defensive coding practices. The primary solution is to apply the latest patches provided by Adobe that specifically target these form handling vulnerabilities within the affected versions of Experience Manager. Administrators should ensure their systems are updated to a version where input validation and output encoding mechanisms have been strengthened. In addition to patching, organizations should implement strict Content Security Policy headers to restrict the execution of inline scripts and limit sources from which JavaScript can be loaded. This adds a layer of defense-in-depth that can prevent many stored XSS payloads from executing even if they are successfully injected into the database.
Security teams should also review access controls for form submission endpoints, ensuring that only necessary roles have write permissions to critical data fields. Implementing server-side input validation that rejects or sanitizes potentially dangerous characters before storage is crucial. Regular security audits and penetration testing focused on stored XSS vectors can help identify similar weaknesses in custom components or integrations within the Adobe Experience Manager ecosystem. By combining timely patch management with robust input handling policies, organizations can effectively neutralize this threat vector and maintain the integrity of their digital experience platforms.