CVE-2025-64545: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64545 is a DOM-based Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows low-privileged attackers to execute malicious scripts in the context of a victim's browser. It affects AEM versions 6.5.23 and earlier (on-premise) and AEM Cloud Service versions prior to 2025.12.0. The vulnerability was published on December 9–10, 2025, with Adobe releasing a patch as part of security bulletin APSB25-115. 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 unsanitized input is processed by the victim's browser DOM, causing arbitrary JavaScript execution. Exploitation requires user interaction — the victim must visit a crafted URL or interact with a manipulated page. Attack patterns associated with this vulnerability include DOM-Based XSS (CAPEC-588), Reflected XSS (CAPEC-591), and Stored XSS (CAPEC-592) (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of the authenticated victim's browser session within AEM, potentially leading to session token theft, credential harvesting, unauthorized actions on behalf of the victim, and defacement of AEM-hosted content. The scope is marked as Changed, meaning the impact can extend beyond the vulnerable component to other browser-accessible resources. Confidentiality and integrity are both assessed as Low impact, with no direct availability impact (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 attacker-controlled input into the DOM without proper sanitization — typical targets include search fields, URL parameters, or fragment identifiers processed client-side.
3. Craft malicious URL: Construct a URL containing a JavaScript payload in a parameter or fragment that will be processed by the vulnerable DOM handler (e.g., 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 low-privileged or higher-privileged AEM user via phishing email, social engineering, or embedding in a shared document.
5. Achieve script execution: When the victim clicks the link and their browser processes the DOM, the injected script executes in the context of the victim's AEM session, enabling session token theft, unauthorized AEM actions, or further payload delivery (Adobe Advisory).

• Network: Unusual HTTP requests to AEM endpoints containing encoded JavaScript payloads (e.g., <script>, onerror=, javascript:) in URL parameters or fragment identifiers; unexpected outbound connections from the AEM server to unknown external hosts.
• Logs: AEM access logs showing requests with XSS-like patterns in query strings or referrer headers; browser-side console errors related to unexpected script execution on AEM pages.
• File System: Unexpected modifications to AEM content repository (CRX) nodes or JSP/HTML component files that could indicate stored XSS payload injection.
• Process/Session: Anomalous AEM user session activity following a user clicking an external link — such as unexpected content modifications, user account changes, or privilege escalation actions performed under a legitimate user's session.

Adobe has released patches addressing CVE-2025-64545 in security bulletin APSB25-115, published December 9, 2025. Organizations running AEM on-premise should upgrade to version 6.5.24.0 or later; AEM Cloud Service customers should ensure their environment is updated to the 2025.12.0 release or later. No specific configuration-based workaround has been publicly documented — upgrading to the patched version is the recommended remediation. Organizations should also enforce Content Security Policy (CSP) headers on AEM deployments as a defense-in-depth measure (Adobe Advisory).

The Center for Internet Security (CIS) issued an advisory noting multiple vulnerabilities in Adobe products, including this CVE, that could allow for arbitrary code execution (CIS Advisory). Spain's CCN-CERT also published a vulnerability notice. No significant independent researcher commentary or social media discussion beyond automated CVE tracking posts has been observed for this specific CVE.