---
cve: "CVE-2020-11020"
severity: "HIGH"
cvss: 8.5
epss: "1.6%"
vendor: "faye"
kev: false
exploited: false
published: "2020-04-29 18:15:13"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T20:03:50+02:00"
---

# CVE-2020-11020

> 8.5 HIGH · 🧪 PoC

## Beschreibung

Faye (NPM, RubyGem) versions greater than 0.5.0 and before 1.0.4, 1.1.3 and 1.2.5, has the potential for authentication bypass in the extension system. The vulnerability allows any client to bypass checks put in place by server-side extensions, by appending extra segments to the message channel. It is patched in versions 1.0.4, 1.1.3 and 1.2.5.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 72a8dac064824fce0cd3558117e1e6402ce0464b (Commit)
- 294f0852e49afde57a1330d0fa26e445e02342f9 (Commit)

## Referenzen

- <https://github.com/faye/faye/security/advisories/GHSA-qpg4-4w7w-2mq5>
- <https://github.com/faye/faye/commit/65d297d341b607f3cb0b5fa6021a625a991cc30e>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2020-11020) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_