---
cve: "CVE-2021-3916"
severity: "MEDIUM"
cvss: 6.5
epss: "1.2%"
vendor: "BookStackApp"
kev: false
exploited: false
published: "2021-11-05 15:15:07"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T07:47:09+02:00"
---

# CVE-2021-3916

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

## CVSS-Vektor

```
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
```

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

## Patch verfügbar (OSV)

- 01cdbdb7aefe0971474a0301d7e62aacb9253860 (Commit)
- 43830a372fc51a8793199d04a34c3f4ebdfccc7b (Commit)

## Referenzen

- <https://huntr.dev/bounties/0be32e6b-7c48-43f0-9cec-433000ad8f64>
- <https://github.com/bookstackapp/bookstack/commit/43830a372fc51a8793199d04a34c3f4ebdfccc7b>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-3916) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_