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Experience ManagerApplication · Adobe

CVE-2026-27256

MEDIUM · 5.4 CVSS v3.1 Published 2026-03-11
Fix available
A fix is available. Upgrade to 6.5.24 / 2026.2.0 or later.
See remediation →
58/100
Remediation priority · Elevated
Remotely reachable

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Adobe Experience Manager versions 6.5.23 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Adobe Experience Manager 6.5.23 and earlier contains a stored Cross-Site Scripting (XSS) vulnerability allowing low-privilege attackers to inject malicious JavaScript into form fields. The malicious payload persists on the server and executes in victims' browsers when they view pages containing the affected form fields.

MitigationUpgrade to AEM 6.5.24 or later. Additionally, implement input validation and output encoding on all form field rendering, and consider deploying Content Security Policy (CSP) headers as defense-in-depth.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Experience ManagerApplication
Affected:< 6.5.24< 2026.2.0= 6.5

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check installed AEM version
    Navigate to Help > About Adobe Experience Manager in the AEM console, or access the system console at /system/console/configMgr and check the org.apache.sling.engine.impl.SlingMainConsole bundle info. Compare the version number to the affected ranges: any version < 6.5.24, < 2026.2.0, or exactly 6.5 is vulnerable.
    Affected if The installed version is < 6.5.24 or < 2026.2.0 or equals 6.5 exactly.
  2. Identify active form fields accepting user input
    In AEM Author, navigate to Tools > General > Forms > Forms and Documents, or check the CRXDE Lite at /content/forms for form definitions. Identify forms that allow unauthenticated or low-privilege user submissions.
    Affected if Any form fields exist that accept input from users without administrative privileges.
  3. Inspect stored form data for malicious scripts
    Access CRXDE Lite at /content/forms and expand the form submission nodes. Search for common XSS payloads in the stored data (look for <script>, javascript:, onerror=, onload=, and HTML tag attributes containing event handlers).
    Affected if Any form submission data contains encoded or raw script tags, javascript: URIs, or HTML event handlers.
  4. Review form field output encoding configuration
    Check the form component's HTL/Sightly template files in /apps (such as core/wcm/components/form/input or form/field) for whether output encoding is applied using context-aware APIs like ${formField @ context='html' @ escapeXml=true}.
    Affected if Form field templates lack proper context-aware output encoding or use raw output of user-submitted values.

If the AEM version is below 6.5.24 (or below 2026.2.0) and the system hosts forms that accept user input without proper output encoding, the environment is vulnerable to stored XSS.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.5.24 / 2026.2.0 or later
Fixed in 6.5.242026.2.0
Interim mitigation

Upgrade to AEM 6.5.24 or later. Additionally, implement input validation and output encoding on all form field rendering, and consider deploying Content Security Policy (CSP) headers as defense-in-depth.

Recommended fix High confidence

AEM 6.5.24+ or AEM 2026.2.0+

  1. Identify the current Adobe Experience Manager version in use by checking the AEM dashboard or version information
  2. If running AEM 6.5.x, upgrade to version 6.5.24 or later
  3. If running AEM 2026.x, upgrade to version 2026.2.0 or later
  4. After upgrade, verify the XSS vulnerability is remediated by testing form fields for proper input sanitization
  5. Confirm the upgrade was successful by checking the AEM version information
Caveat Review Adobe's release notes for 6.5.24 for any compatibility or configuration changes that may require adjustment

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Experience Manager Scoped from the published advisory
  • Consultation4.0 h
  • Implementation12.0 h
  • Testing8.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,880
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,808.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-27256 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data