CVE-2025-64564: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64564 is a DOM-based Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows a low-privileged attacker to execute malicious scripts in the context of a victim's browser. It affects AEM versions 6.5.23 and earlier (on-premises) and AEM Cloud Service versions prior to 2025.12.0. The vulnerability was published on December 9, 2025, and patched on December 9–10, 2025. It carries a CVSS v3.1 base score of 5.4 (Medium) (Adobe Advisory, ENISA EUVD).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting), specifically of the DOM-based variant. An attacker with low privileges can craft a malicious URL or manipulate a web page such that unsanitized input is processed by the victim's browser DOM, triggering script execution without server-side reflection. Exploitation requires user interaction — the victim must visit a crafted URL or interact with a manipulated page. No public proof-of-concept code has been identified at this time (Adobe Advisory, ENISA EUVD).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of the authenticated victim's browser session within AEM, resulting in low confidentiality and low integrity impact with no availability impact. This could enable session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, or delivery of further payloads within the AEM environment. The changed scope indicator reflects that the impact extends beyond the attacker's own privilege context into the victim's browser session (Adobe Advisory).

1. Reconnaissance: Identify AEM instances running version 6.5.23 or earlier, or AEM Cloud Service prior to 2025.12.0, using passive reconnaissance (e.g., Shodan, Censys) or by inspecting publicly accessible AEM login pages and version indicators.
2. Obtain low-privileged access: Register or obtain a low-privileged AEM user account, as the vulnerability requires authenticated (low-privilege) access to craft the malicious payload.
3. Craft malicious URL or page: Identify a DOM-based XSS sink within AEM's client-side JavaScript that processes attacker-controlled input (e.g., URL fragment, query parameter) without proper sanitization.
4. Deliver payload to victim: Craft a URL containing a malicious JavaScript payload targeting the vulnerable DOM sink and deliver it to a higher-privileged AEM user via phishing, social engineering, or embedding in AEM content.
5. Achieve objective: When the victim visits the crafted URL, the malicious script executes in their browser context, enabling session token theft, unauthorized AEM actions, or further exploitation (Adobe Advisory, ENISA EUVD).

• Network: Unusual HTTP requests to AEM endpoints containing JavaScript payloads or encoded script tags (e.g., <script>, javascript:, %3Cscript%3E) in URL fragments or query parameters.
• Logs: AEM access logs showing requests with suspicious URL-encoded characters or DOM-manipulation patterns in query strings; browser-side console errors related to unexpected script execution.
• File System: Unexpected modifications to AEM client library files or JavaScript resources that could indicate persistent XSS payload injection.
• Process/Session: Anomalous AEM session activity from privileged accounts shortly after interaction with suspicious URLs, such as unexpected content modifications, user creation, or permission changes.

Adobe has released patches addressing CVE-2025-64564 in AEM 6.5.24.0 (for on-premises deployments) and AEM Cloud Service 2025.12.0. Organizations should upgrade to these versions immediately. No specific configuration-based workaround has been published; upgrading to the patched release is the recommended and primary remediation. Additionally, organizations should enforce strict Content Security Policy (CSP) headers on AEM instances as a defense-in-depth measure (Adobe Advisory).

The Center for Internet Security (CIS) issued an advisory noting that multiple vulnerabilities in Adobe products, including those in AEM, could allow for arbitrary code execution, recommending prompt patching (CIS Advisory). Tenable flagged the vulnerability in its plugin pipeline shortly after disclosure. No significant independent researcher commentary or social media discussion specific to CVE-2025-64564 has been identified beyond standard vulnerability tracking coverage.