CVE-2025-64550: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64550 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 9–10, 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. Exploitation requires a low-privileged authenticated attacker and user interaction — such as a victim visiting a crafted URL or interacting with a manipulated web page — allowing the attacker to inject and execute malicious JavaScript in the victim's browser context. The attack vector is network-based with low attack complexity, and the scope is changed (affecting resources beyond the vulnerable component). No public proof-of-concept code has been identified at this time (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary scripts in the victim's browser session within the AEM application context, resulting in limited confidentiality and integrity impacts (e.g., session token theft, unauthorized actions on behalf of the victim, or content manipulation). Availability is not directly impacted. The changed scope means the attack can affect browser-side resources beyond the AEM origin, potentially enabling phishing, credential harvesting, or further lateral movement within an organization's AEM-managed environment (Adobe Advisory).

1. Reconnaissance: Identify target AEM instances running versions 6.5.23 or earlier, or AEM Cloud Service prior to 2025.12.0, using passive reconnaissance or web fingerprinting techniques.
2. Obtain low-privileged access: Register or obtain a low-privileged AEM user account (e.g., a contributor or author role).
3. Craft malicious payload: Construct a URL or web page that triggers the DOM-based XSS vulnerability by injecting a malicious JavaScript payload into a vulnerable DOM sink within AEM's client-side code.
4. Deliver to victim: Send the crafted URL or manipulated page link to a target user (e.g., via phishing email or social engineering), inducing them to click or interact with it.
5. Script execution: Upon victim interaction, the malicious script executes in the victim's browser within the AEM application context, enabling session token theft, unauthorized actions, or further exploitation (Adobe Advisory).

• Network: Unusual outbound requests from victim browsers to attacker-controlled domains following AEM page interactions; unexpected cross-origin requests originating from AEM pages.
• Logs: AEM access logs showing requests to AEM pages with suspicious or encoded JavaScript fragments in URL parameters or hash fragments; repeated access to specific AEM pages from multiple user accounts in a short timeframe.
• Browser/Application: Unexpected JavaScript execution errors or console warnings related to DOM manipulation in AEM pages; users reporting unexpected redirects or pop-ups while using AEM.

Adobe has released patches addressing CVE-2025-64550 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 release 2025.12.0 or later. No configuration-based workaround is documented; upgrading to the patched version is the recommended and prioritized remediation action (Adobe Advisory).

The Center for Internet Security (CIS) published an advisory noting multiple vulnerabilities in Adobe products, including CVE-2025-64550, that could allow for arbitrary code execution, recommending prompt patching (CIS Advisory). Spain's CCN-CERT also flagged the vulnerability in their daily security bulletin. General community reaction has been routine, with no notable researcher commentary or significant social media discussion identified beyond standard vulnerability tracking posts.