CVE-2026-27234
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 · uneditedAdobe Experience Manager versions 6.5.23 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by an 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 · moderate confidenceStored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager versions 6.5.23 and earlier allows attackers to inject malicious JavaScript into vulnerable form fields. When users browse to pages containing these compromised fields, the injected scripts execute in their browsers.
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< 6.5.24.0< 2026.2.0= 6.5CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Check Adobe Experience Manager versionAccess the AEM Welcome page at /aem/start.html or go to System Information in the Help menu to view the product versionAffected if The installed version is less than 6.5.24.0, less than 2026.2.0, or equals exactly 6.5
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Identify forms using AEM Forms or custom form componentsBrowse to the Forms section in AEM Assets or check for adaptive forms, form fragments, or custom form components in the /content/forms pathAffected if Form components are present and user-created content can be submitted into form fields
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Inspect form field input validation configurationOpen form field component properties in the AEM Forms editor or edit view of a form and check the Validation settings for each fieldAffected if Form fields have no input validation rules enabled, or validation is set to 'None' allowing arbitrary content including script tags
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Test for unencoded output in form field previewsCreate a test form field, enter a script tag such as <script>alert('XSS')</script> into the field, save the form, and view the rendered pageAffected if The script tag is rendered as-is in the browser instead of being encoded or stripped
You are affected if your AEM version is below 6.5.24.0 or below 2026.2.0 AND you use form functionality where input validation is not configured on form fields.
Generated from the published advisory. Verify against your own configuration.
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 · scoped6.5.24.02026.2.0
Upgrade Adobe Experience Manager to a version beyond 6.5.23, or implement input validation and output encoding on affected form fields to prevent script injection.
AEM 6.5.24.0 or later (6.5.x track) OR AEM 2026.2.0 or later (2026 track)
- 1. Back up your AEM instance (repository, configurations, and content) before proceeding with the upgrade.
- 2. Review Adobe Experience Manager 6.5.24 release notes at helpx.adobe.com for any migration or compatibility requirements.
- 3. Stop the AEM author and publish instances.
- 4. Upgrade AEM to version 6.5.24.0 or later by applying the latest service pack or cumulative fix pack from Adobe's Software Distribution portal.
- 5. After upgrading, verify that the form fields previously vulnerable to XSS are now properly sanitizing input.
- 6. Test that malicious script payloads are no longer executable when browsing pages containing the affected form fields.
- 7. Restart the author and publish instances.
- 8. Monitor for any issues and refer to Adobe's post-upgrade documentation for additional verification steps.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27234 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-27234 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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