CVE-2025-64551: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64551 is a DOM-based Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows low-privileged network attackers 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 disclosed 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), specifically of the DOM-based variant. An attacker with low privileges can craft a malicious URL or manipulate a web page such that, when a victim interacts with it, unsanitized input is processed by the browser's DOM and executes attacker-controlled JavaScript. Exploitation requires user interaction (e.g., visiting a crafted link), and the scope is changed, meaning the injected script can affect resources beyond the vulnerable component's origin (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the victim's browser session within the AEM application context, resulting in limited confidentiality and integrity impacts (CVSS C:L/I:L). This could enable session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, or redirection to malicious sites. While availability is not directly impacted, the changed scope means the attack can affect other browser-accessible resources beyond the AEM instance itself (Adobe Advisory).

1. Reconnaissance: Identify AEM instances running versions 6.5.23 or earlier, or AEM Cloud Service prior to 2025.12.0, using web fingerprinting tools or Shodan searches for AEM-specific paths (e.g., /libs/granite/core/content/login.html).
2. Identify vulnerable DOM sink: Locate AEM pages or components that reflect user-controlled input into the DOM without proper sanitization — typical targets include search fields, URL parameters, or hash fragments processed by client-side JavaScript.
3. Craft malicious payload: Construct a URL or web page that injects a JavaScript payload into the vulnerable DOM sink, for example: https://target-aem.example.com/vulnerable-page.html#<img src=x onerror=alert(document.cookie)>.
4. Deliver to victim: Send the crafted URL to a target user (e.g., via phishing email or social engineering), who must be authenticated to AEM with at least low-level privileges.
5. Achieve objective: When the victim visits the URL, the malicious script executes in their browser, enabling session token theft, credential harvesting, or unauthorized AEM actions on behalf of the victim (Adobe Advisory).

• Network: Unusual outbound requests from victim browsers to attacker-controlled domains following interaction with AEM pages; HTTP requests containing encoded JavaScript payloads in URL fragments or query parameters targeting AEM endpoints.
• Logs: AEM access logs showing requests with suspicious URL-encoded characters (%3Cscript%3E, onerror=, javascript:) in query strings or hash parameters; repeated access to the same AEM page from different user accounts with anomalous parameters.
• Browser/Application: Unexpected JavaScript execution errors in browser console logs related to AEM pages; user-reported unexpected redirects or pop-ups while using AEM.

Adobe has released patches addressing CVE-2025-64551 as part of security bulletin APSB25-115, published December 9, 2025. Users should upgrade AEM on-premises to version 6.5.24.0 or later, and AEM Cloud Service to the 2025.12.0 release or later. No specific configuration-based workaround is documented; upgrading to the patched version is the recommended and primary remediation action (Adobe Advisory).

The Center for Internet Security (CIS) issued an advisory noting multiple vulnerabilities in Adobe products, including CVE-2025-64551, warning that exploitation could allow arbitrary code execution (CIS Advisory). No significant independent researcher commentary or social media discussion specific to this CVE has been identified beyond standard vulnerability database tracking.