CVE-2026-109392CWE-79cross-site-scripting

CVE-2026-109392

Medium · published October 12, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
6.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00171 · 6.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-12T20:17Z
References (5)
https://github.com/pimcore/admin-ui-classic-bundle/blob/2.3/templates/admin/data_object/data_object/preview_version.html.twig#L198 · [email protected]https://github.com/pimcore/pimcore · [email protected]https://github.com/pimcore/pimcore/blob/v2026.3.1/models/DataObject/ClassDefinition/Data/ExternalImage.php#L169-L203 · [email protected]https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/rJCbgCKjMe · [email protected]https://www.vulncheck.com/advisories/pimcore-through-2026.3.1-stored-xss-via-externalimage-field-version-preview · [email protected]
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 15:16Z
    Pimcore through 2026.3.1 Stored XSS via ExternalImage Field Version Preview
    cvelistv5
  • 12 OCT 15:16Z
    Pimcore through 2026.3.1 Stored XSS via ExternalImage Field Version Preview
    cvelistv5