---
cve: "CVE-2021-3915"
severity: "HIGH"
cvss: 7.6
epss: "93%"
vendor: "BookStackApp"
kev: false
exploited: false
published: "2021-11-13 10:15:07"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-09T12:26:00+02:00"
---

# CVE-2021-3915

> 7.6 HIGH · 🧪 PoC

## Beschreibung

bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 01cdbdb7aefe0971474a0301d7e62aacb9253860 (Commit)
- ae155d67454d6b9f6c93b2bb457aaa4b2eb1a9ed (Commit)

## Referenzen

- <https://huntr.dev/bounties/fcb65f2d-257a-46f4-bac9-f6ded5649079>
- <https://github.com/bookstackapp/bookstack/commit/ae155d67454d6b9f6c93b2bb457aaa4b2eb1a9ed>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-3915) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_