---
cve: "CVE-2022-31065"
severity: "MEDIUM"
cvss: 6.5
epss: "0.8%"
vendor: "bigbluebutton"
kev: false
exploited: false
published: "2022-06-27 20:15:08"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T06:29:26+02:00"
---

# CVE-2022-31065

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

BigBlueButton is an open source web conferencing system. In affected versions an attacker can embed malicious JS in their username and have it executed on the victim's client. When a user receives a private chat from the attacker (whose username contains malicious JavaScript), the script gets executed. Additionally when the victim receives a notification that the attacker has left the session. This issue has been patched in version 2.4.8 and 2.5.0. There are no known workarounds for this issue.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- e2a2fdc5500192c603ae888a67dca0affdf00d7c (Commit)

## Referenzen

- <https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-8m2p-7qv3-qff7>
- <https://github.com/bigbluebutton/bigbluebutton/pull/15087>
- <https://github.com/bigbluebutton/bigbluebutton/pull/15090>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2022-31065) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_