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Technical Analysis: CVE-2026-47980
A stored Cross-Site Scripting (XSS) vulnerability exists in Adobe Experience Manager (AEM) versions 6.5.24, LTS SP1, 2026.04, and earlier. This flaw arises from insufficient sanitization of user-supplied input within specific form fields. An authenticated attacker with low-level privileges, such as a content author or contributor, can exploit this vulnerability by injecting malicious JavaScript code into a vulnerable field within a content editing interface.
The attack process begins with the attacker identifying a form field that does not properly validate or encode input before storing it in the application’s database. The attacker crafts a payload containing JavaScript code, for example, `` or more complex sequences designed to steal session cookies or perform actions on behalf of another user. When the victim, typically a user with higher privileges like an administrator or a reviewer, navigates to the page containing the injected content, the script is executed within their browser context.
The vulnerability’s impact is considered Medium with a CVSS base score of 5.4. The attack vector is network-based (AV:N), requiring low attack complexity (AC:L) and low-privileged access (PR:L). User interaction is required (UI:R), as a victim must access the compromised page. The scope (S:C) is changed, meaning the successful exploitation can affect resources beyond the vulnerable component’s initial security authority. The impact on confidentiality and integrity is low (C:L/I:L), with no effect on availability (A:N). The core issue is improper neutralization of input during web page generation (CWE-79: Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’)). Adobe has acknowledged this vulnerability and released security updates. Users and administrators are strongly advised to apply the patches referenced in the official Adobe security bulletin (APSB26-31) to mitigate this risk. There are no known public exploits at the time of this analysis, but the potential for data theft and session hijacking remains significant for unpatched systems.
DailyCVE Form:
Platform: Adobe Experience Manager
Version: 6.5.24, LTS SP1, 2026.04
Vulnerability : Stored XSS
Severity: Medium (5.4)
date: 2026-06-09
Prediction: 2026-06-10
What Undercode Say:
Check AEM version via system console
curl -u admin:admin http://localhost:4502/system/console/status-productinfo.json | jq '.productInfo'
Simulate vulnerability test on a form field (PoC)
curl -X POST -u attacker:password http://localhost:4502/content/formpage/jcr:content/par/form/field \
-d "fieldValue=<img src=x onerror=alert('CVE-2026-47980')>"
Identify fields with insufficient encoding (sample w/ 'grep')
find . -name ".jsp" -exec grep -l "unescapedOutput" {} \;
How Exploit:
An attacker with low privileges (e.g., ‘content-author’) identifies a form field that does not enforce proper HTML encoding. The attacker submits a crafted payload, such as <script>alert(document.cookie)</script>, into this field. When an administrator or any higher-privileged user later views the page containing the stored payload, the script executes in their browser, potentially exfiltrating session tokens or performing unauthorized actions on their behalf.
Protection:
- Apply the official security update (APSB26-31) from Adobe immediately.
- Implement a strict Content Security Policy (CSP) to block inline script execution.
- Use Apache Sling’s XSS protection APIs (
XSSAPI.filterHTML()) to encode all user-controlled output. - Disable unnecessary rich-text editing capabilities for low-privileged users.
Impact:
Successful exploitation leads to arbitrary JavaScript execution in a victim’s browser. Potential consequences include session hijacking, credential theft, unauthorized publishing of malicious content, and data exfiltration. The low required privileges lower the barrier to exploitation, making this a significant risk for any organization using an unpatched AEM instance.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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