Pimcore Customer Data Framework Improper Access Control allows unprivileged user to access customers duplicates list

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

• CVE-2024-21666: 0.56% estimated exploitation activity in the next 30 days; percentile 46.91 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary An authenticated and unauthorized user can access the list of potential duplicate users and see their data. Details Permissions do not seem to be enforced when reaching the /admin/customermanagementframework/duplicates/list endpoint allowing an authenticated user without the permissions to access the endpoint and query the data available there. It seems that the access control is not enforced in this place : <https://github.com/pimcore/customer-data-framework/blob/b4af625ef327c58d05ef7cdf145fa749d2d4195e/src/Controller/Admin/DuplicatesController.php#L43 PoC In order to reproduce the issue, the following steps can be followed : 1. As an administrator : a. Create a role without any permission through Settings → User & Roles → Roles in the administration panel b. Create an user through Settings → User & Roles → Users and assign it the unprivileged role previously created 2. Log out the current administrator and log in with this new user 3. Access to the following endpoint…

Published by the source

10 Jan 2024, 15:22 UTC

Last modified by the source

11 Jan 2024, 15:41 UTC

Source last checked

26 Oct 2026, 14:14 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-c38c-c8mh-vq68

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# Patch Next advisory brief: CVE-2024-21666

Advisory: Pimcore Customer Data Framework Improper Access Control allows unprivileged user to access customers duplicates list
IDs: CVE-2024-21666, GHSA-c38c-c8mh-vq68
Record: https://patchnext.com/advisories/cve-2024-21666 (revision 1, source checked 26 Oct 2026, 14:14 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pimcore/customer-management-framework-bundle 4.0.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist pimcore/customer-management-framework-bundle: affected < 4.0.6; fixed in 4.0.6

## Suggested inspection (read-only)
- Packagist pimcore/customer-management-framework-bundle: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pimcore/customer-management-framework-bundle.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-c38c-c8mh-vq68 (GitHub-reviewed advisory GHSA-c38c-c8mh-vq68 lists affected ranges: Packagist pimcore/customer-management-framework-bundle >=0 <4.0.6)

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