Pimcore contains Unrestricted Upload of File with Dangerous Type

Exploitation

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

CVSS

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

EPSS

• CVE-2023-23937: 0.48% estimated exploitation activity in the next 30 days; percentile 41.14 (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.

Impact The upload functionality for updating user profile does not properly validate the file content-type, allowing any authenticated user to bypass this security check by adding a valid signature (p.e. GIF89) and sending any invalid content-type. This could allow an authenticated attacker to upload HTML files with JS content that will be executed in the context of the domain. Patches Update to version 10.5.16 or apply this patch manually https://github.com/pimcore/pimcore/pull/14125.patch

Published by the source

2 Feb 2023, 17:00 UTC

Last modified by the source

13 Feb 2023, 16:56 UTC

Source last checked

26 Oct 2026, 14:05 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-8xv4-jj4h-qww6

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# Patch Next advisory brief: CVE-2023-23937

Advisory: Pimcore contains Unrestricted Upload of File with Dangerous Type
IDs: CVE-2023-23937, GHSA-8xv4-jj4h-qww6
Record: https://patchnext.com/advisories/cve-2023-23937 (revision 1, source checked 26 Oct 2026, 14:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pimcore/pimcore 10.5.16. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist pimcore/pimcore: affected < 10.5.16; fixed in 10.5.16

## Suggested inspection (read-only)
- Packagist pimcore/pimcore: 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/pimcore.
- 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-8xv4-jj4h-qww6 (GitHub-reviewed advisory GHSA-8xv4-jj4h-qww6 lists affected ranges: Packagist pimcore/pimcore >=0 <10.5.16)

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