---
cve: "CVE-2025-55200"
severity: "HIGH"
cvss: 7.1
epss: "0.2%"
vendor: "bigbluebutton"
kev: false
exploited: false
published: "2025-10-09 19:15:43"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-30T11:19:59+02:00"
---

# CVE-2025-55200

> 7.1 HIGH · 🧪 PoC

## Beschreibung

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.13, the "Shared Notes" feature contains a Stored Cross-Site Scripting (XSS) vulnerability with the input location being the "Username" field and the output location on the "Shared Notes" page, when a user with a malicious username is editing content. This vulnerability allows a low-privileged user to execute arbitrary JavaScript in the context of higher-privileged users (e.g., Admins) who open the Shared Notes page. Version 3.0.13 fixes the issue.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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 | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 611795205c55e0a034d0d438efe7802a76aaee7f (Commit)
- 2004667668f7bbb29aa235943275ee76226bad4d (Commit)

## BSI-Hinweise (deutsch)

- [BigBlueButton: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2025-2248)

## Referenzen

- <https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-9jv9-cjrm-grj2>
- <https://github.com/bigbluebutton/bbb-pads/pull/67>
- <https://github.com/bigbluebutton/bigbluebutton/pull/23693>
- <https://github.com/bigbluebutton/bbb-pads/releases/tag/v1.5.4>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-55200) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_