Description

Pimcore through 2026.3.1 contains a stored cross-site scripting vulnerability that allows authenticated backend users to inject scripts by storing unescaped URLs in ExternalImage fields. Attackers with data object edit permission can store attribute-breaking payloads that execute JavaScript in the admin origin when other users open version preview or diff views.

Related CPE's

Could not find any relations

References

https://github.com/pimcore/admin-ui-classic-bundle/blob/2.3/templates/admin/data_object/data_object/preview_version.html.twig#L198

https://github.com/pimcore/pimcore

https://github.com/pimcore/pimcore/blob/v2026.3.1/models/DataObject/ClassDefinition/Data/ExternalImage.php#L169-L203

https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/rJCbgCKjMe

https://www.vulncheck.com/advisories/pimcore-through-2026.3.1-stored-xss-via-externalimage-field-version-preview

Weaknesses

[email protected]

Primary
CWE-79

CVSS impact metrics

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

5.4 · Medium

Information

Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-12T16:17:04.557Z

2 hours ago

Last modified

2026-10-12T16:17:04.687Z

2 hours ago