---
cve: "CVE-2026-61873"
severity: "HIGH"
cvss: 7.2
epss: "26%"
vendor: "getgrav"
kev: false
exploited: false
published: "2026-07-15 12:18:22"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-09T05:30:04+02:00"
---

# CVE-2026-61873

> 7.2 HIGH · 🧪 PoC

## Beschreibung

Grav before 9.1.8 contains an arbitrary file write vulnerability in the Form plugin's process.save.filename parameter, which is validated against path traversal before Twig processing but never re-validated after rendering. Attackers can submit form data containing path traversal sequences that are processed through Twig templates, allowing them to write arbitrary files including PHP webshells to the web root or other sensitive directories.

## CVSS-Vektor

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

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

## Referenzen

- <https://github.com/getgrav/grav/security/advisories/GHSA-q532-mvx7-42qg>
- <https://www.vulncheck.com/advisories/grav-before-arbitrary-file-write-via-twig-processed-filename>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-61873) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_