---
cve: "CVE-2026-56381"
severity: "MEDIUM"
cvss: 4.6
epss: "25%"
vendor: "craftcms"
kev: false
exploited: false
published: "2026-06-21 14:16:25"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T09:32:46+02:00"
---

# CVE-2026-56381

> 4.6 MEDIUM · 🧪 PoC

## Beschreibung

Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |

## Patch verfügbar (OSV)

- 8e23a7a14d50f169c10a487348c993384d479e06 (Commit)

## Referenzen

- <https://github.com/craftcms/cms/security/advisories/GHSA-g3hp-vvqf-8vw6>
- <https://www.vulncheck.com/advisories/craft-cms-stored-xss-via-user-group-name-in-user-permissions-page>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-56381) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_