CVE-2026-106631 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 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 part of a single request, this stored variant persists on the server side within the application's database or content repository. Consequently, every time a legitimate user accesses the page containing the compromised field, their browser retrieves and executes the injected script automatically, creating a persistent threat vector that does not require social engineering tricks like phishing links to trigger execution beyond normal navigation of affected pages.
The technical mechanism behind this vulnerability stems from insufficient input validation and output encoding practices within the Adobe Experience Manager interface components. When data is submitted through forms such as content creation tools or user profile updates, the system fails to properly neutralize special characters that have meaning in HTML contexts, particularly angle brackets and quotation marks used to delimit script tags. This oversight permits the injection of arbitrary JavaScript code which becomes part of the stored page content. The scope change noted indicates that previously this might have been limited to higher-privileged users or specific administrative interfaces, but recent updates or configuration variations may have expanded the attack surface to include areas accessible by lower-level accounts, thereby increasing the likelihood of exploitation by internal threats or compromised low-level credentials.
The operational impact of exploiting this vulnerability is significant as it enables session hijacking, credential theft, and defacement of user-facing content through malicious script execution in the victim's browser context. Attackers can leverage Document Object Model manipulation to steal authentication cookies, redirect users to phishing sites mimicking legitimate Adobe Experience Manager login pages, or perform actions on behalf of the authenticated user if cross-site request forgery protections are also weakly implemented. Since the payload is stored server-side, it affects all subsequent viewers regardless of whether they interact with the specific form field again, leading to widespread compromise potential within an organization using this platform for digital experience management. This persistence distinguishes it from transient attacks and makes remediation more complex as cleanup requires not only patching but also purging malicious content already stored in databases.
Mitigation strategies must focus on both immediate containment and long-term architectural improvements. Administrators should immediately apply the latest security patches provided by Adobe to address the specific input validation flaws identified in this vulnerability report. In parallel, implementing strict Content Security Policy headers can help mitigate the impact of any successfully injected scripts by restricting script execution sources and preventing unauthorized data exfiltration. Additionally, organizations should enforce rigorous role-based access controls to ensure that only trusted users with verified identities have write access to form fields that are subsequently rendered in public or shared views. Regular security audits focusing on output encoding practices across all user input points will further reduce the risk of similar stored XSS vulnerabilities emerging in other parts of the application ecosystem aligned with CWE-79 standards for improper neutralization of input during web page generation and MITRE ATT&CK techniques related to client-side injection attacks.