---
cve: "CVE-2021-39184"
severity: "MEDIUM"
cvss: 6.8
epss: "1.1%"
vendor: "electron"
kev: false
exploited: false
published: "2021-10-12 19:15:07"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T01:51:45+02:00"
---

# CVE-2021-39184

> 6.8 MEDIUM · 🧪 PoC

## Beschreibung

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. A vulnerability in versions prior to 11.5.0, 12.1.0, and 13.3.0 allows a sandboxed renderer to request a "thumbnail" image of an arbitrary file on the user's system. The thumbnail can potentially include significant parts of the original file, including textual data in many cases. Versions 15.0.0-alpha.10, 14.0.0, 13.3.0, 12.1.0, and 11.5.0 all contain a fix for the vulnerability. Two workarounds aside from upgrading are available. One may make the vulnerability significantly more difficult for an attacker to exploit by enabling `contextIsolation` in one's app. One may also disable the functionality of the `createThumbnailFromPath` API if one does not need it.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 3d0705d81fd8b829372a732577b5c275352a9da6 (Commit)
- ea234f9cb991bfbb0bd4bff7bdf7aba2dd726dfb (Commit)

## Referenzen

- <https://github.com/electron/electron/security/advisories/GHSA-mpjm-v997-c4h4>
- <https://github.com/electron/electron/pull/30728>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-39184) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_