---
cve: "CVE-2026-65693"
severity: "HIGH"
cvss: 8.6
epss: "0.5%"
vendor: "microweber"
kev: false
exploited: false
published: "2026-07-24 15:33:35"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-25T07:55:27+02:00"
---

# CVE-2026-65693

> 8.6 HIGH · 🧪 PoC

## Beschreibung

Microweber CMS through 2.0.20 contains a server-side template injection vulnerability that allows authenticated administrators to achieve arbitrary OS command execution by injecting Twig expressions into mail templates. Attackers can exploit the unsandboxed Twig environment in TwigView::render(), which lacks SandboxExtension or a SecurityPolicy, to inject malicious expressions such as filter('system') into mail template bodies stored unsanitized in the database, causing automatic payload execution on each subsequent application event that triggers a mail dispatch.

## CVSS-Vektor

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

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

## Referenzen

- <https://gist.github.com/W40X/584f4b088d310bc5280cc74bbf97831a>
- <https://www.vulncheck.com/advisories/microweber-cms-server-side-template-injection-via-mail-templates>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-65693) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_