External risk intelligence

Adobe Experience Manager Stored Cross-Site Scripting Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-106629

Adobe Experience Manager is a web content management system commonly deployed as an internet-facing web application. Stored XSS vulnerabilities in such platforms are typically reachable through public-facing web forms or content entry fields exposed to users or visitors, making them a common part of the web-facing attack surface.

Cross-site Scripting

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

Adobe Experience Manager has a security flaw related to how it handles user input in form fields. This vulnerability could allow an attacker to insert malicious code that, if a user views the affected page, might execute in their browser, potentially leading to unauthorized access or control of user accounts.

Malicious code can be inserted into forms.
Could lead to account takeover.
Verify if this impacts your Adobe Experience Manager instances.

Attack Path

How an attacker could exploit the issue

An attacker could inject malicious scripts into vulnerable form fields within Adobe Experience Manager. When a victim visits a page containing these fields, the malicious JavaScript could execute in their browser. This could potentially lead to unauthorized access or control over the victim's account or session.

No authentication required to access.
Injecting scripts into form fields.
Malicious script execution in victim's browser.

Live Threat

Current exploitation, exposure, and threat context

This stored Cross-Site Scripting vulnerability in Adobe Experience Manager could allow an attacker to inject malicious scripts into form fields. When a victim views a page with these injected scripts, it may lead to the execution of arbitrary JavaScript in their browser, potentially impacting their account or session.

User session data could be exposed.
Malicious scripts could run in the victim's browser.
Unauthorized access to user accounts may occur.

Operational Fix

Recommended remediation, mitigation, and detection steps

Adobe Experience Manager's stored XSS vulnerability likely impacts teams responsible for web content management and application security. The first practical step is to identify all instances of Adobe Experience Manager, determine their exposure and criticality, and then assign ownership for remediation.

Application owners should lead the remediation effort.
Verify form field sanitization and user input validation.
Plan maintenance for controlled patching or mitigation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Adobe Experience Manager?

Adobe Experience Manager is a comprehensive web content management system used by organizations to create, manage, and deliver digital marketing assets and web experiences. It serves as a central hub for building websites and mobile applications, allowing teams to handle complex content structures and user interactions across various digital channels.

What does CVE-2026-106629 mean?

This identifier refers to a stored Cross-Site Scripting (XSS) vulnerability, classified as CWE-79. In plain terms, it means the application fails to properly clean user-provided data before saving it. An attacker can use this flaw to plant malicious scripts directly into a website's database. Later, when a regular user views a page containing that compromised content, the browser unknowingly executes the hidden script.

How is this stored XSS triggered?

The attack occurs when a user inputs malicious code into a vulnerable form field. Once saved by the system, the script becomes part of the stored page content. It is important to note that simply visiting a site does not trigger the bug; the script only executes when a user navigates specifically to the page where the attacker's malicious data was previously submitted and rendered.

How relevant is this to my infrastructure?

According to Halo Surface Signal, this vulnerability is particularly significant if your instances are internet-facing. Because Adobe Experience Manager is often deployed to serve public-facing web content, any forms accessible to external visitors could be used as an entry point. Systems that are restricted to internal, authenticated environments may face a reduced risk profile compared to those exposed to the open web.

What should I do if I run Adobe Experience Manager?

Start by identifying all active instances of the software within your environment to determine which are internet-facing. Once mapped, coordinate with your application owners to review current input validation practices. Your primary goal is to ensure that all user-supplied data in form fields is properly sanitized before it is accepted or displayed by the system.

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.