---
cve: "CVE-2021-4143"
severity: "HIGH"
cvss: 8.1
epss: "89%"
vendor: "bigbluebutton"
kev: false
exploited: false
published: "2022-01-19 23:15:08"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T07:33:54+02:00"
---

# CVE-2021-4143

> 8.1 HIGH · 🧪 PoC

## Beschreibung

Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 72d5e54e3eb3cd442d23dc097158fe81f1efda82 (Commit)
- 62040bdcb3c2f993ba72ab89f4db2015e18d1706 (Commit)

## Referenzen

- <https://huntr.dev/bounties/e67603e6-8497-4ab6-b93a-02c26407d443>
- <https://github.com/bigbluebutton/bigbluebutton/commit/62040bdcb3c2f993ba72ab89f4db2015e18d1706>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-4143) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_