CVE-2026-109392

5.4Medium

Published 12 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash

5.4Medium

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required
Impact: Limited impact
Weakness: CWE-79

Impact

Authenticated backend users with data object edit rights can execute arbitrary JavaScript in another user's session when they view version previews or diffs. This requires an attacker to save a malicious payload and trick another backend user into opening the affected version view.

Root cause

ExternalImage fields do not properly sanitize or escape URLs, allowing attribute-breaking payloads in preview_version.html.twig.

Affected systems

Pimcore through 2026.3.1

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Fix & remediation

No fixed version is specified in the advisory; mitigate immediately by restricting data object edit permissions to trusted backend users until a patch is released.

shell

$ composer show pimcore/pimcore

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD 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.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-109392