---
cve: "CVE-2026-34567"
severity: "CRITICAL"
cvss: 9.1
epss: "0.4%"
vendor: "ci4-cms-erp"
kev: false
exploited: false
published: "2026-04-01 22:16:20"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-08T06:55:26+02:00"
---

# CVE-2026-34567

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input when creating or editing blog posts within the Categories section. An attacker can inject a malicious JavaScript payload into the Categories content, which is then stored server-side. This stored payload is later rendered unsafely when the Categories are viewed via blog posts, without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- 954622ef3d8527cde0b66b8460c26cb5cd0bab15 (Commit)

## Referenzen

- <https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-r33w-c82v-x5v7>
- <https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-34567/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_