CVE-2026-27257
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 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 confidenceStored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager versions 6.5.23 and earlier allows low-privileged authenticated users to inject malicious JavaScript into form fields. The payload persists in the system and executes when other users view pages containing the affected fields.
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< 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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Verify AEM versionAccess the AEM System Information console (typically at /system/console/status-htmlproductinfo or check the version.properties file in the crx-quickstart directory) to identify the installed version numberAffected if The installed version is 6.5.23 or earlier, equals 6.5, or is below 2026.2.0
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Confirm form functionality is enabledReview the AEM instance for any form components, Adaptive Forms, or custom form fields that accept user input. Check the Commerce/Forms section in the AEM Assets console or review deployed form-related bundles in the OSGi consoleAffected if Form components or user input fields are present and accessible to authenticated users
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Identify low-privilege user access to formsReview user group permissions in the AEM User Administration console (accessible at /libs/granite/security/content/useradmin) to determine if users with low-privileged roles (such as content-authors or guests) have write access to form content or form submission endpointsAffected if Low-privileged authenticated users have the ability to create or edit form field content
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Inspect stored form data for malicious contentQuery the AEM content repository (via CRXDE Lite at /crx/de or using the Query Builder API) for stored form field submissions or user-generated content that may contain unsanitized script tags, particularly in fields that accept rich text or HTML inputAffected if Stored form data contains unsanitized script tags, event handlers (onerror, onload, onclick), or javascript: URIs in user-controllable fields
The environment is affected if the AEM version falls within the vulnerable ranges AND form fields accepting user input are accessible to low-privileged authenticated users without proper sanitization.
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 · scoped6.5.242026.2.0
Apply the vendor patch (AEM 6.5.24 or later/hotfix) and conduct input validation review on all form fields across the AEM instance to ensure user-supplied content is properly sanitized before rendering.
Adobe Experience Manager 6.5.24 or later (or 2026.2.0+ for the newer release branch)
- Back up the current Adobe Experience Manager instance and content repository before upgrading
- Review the Adobe Experience Manager 6.5.24 release notes for any known issues or migration requirements
- Download Adobe Experience Manager 6.5.24 (or later) from the official Adobe distribution portal
- Install the upgrade following Adobe's standard upgrade procedures for AEM 6.5
- After upgrade, verify that the stored XSS vulnerability in form fields is no longer present by testing the vulnerable form inputs
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27257 — 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-2026-27257 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