---
cve: "CVE-2025-48731"
severity: "MEDIUM"
cvss: 6.4
epss: "0.2%"
vendor: "Mattermost"
kev: false
exploited: false
published: "2025-08-11 19:15:27"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-11-04T15:33:37+01:00"
---

# CVE-2025-48731

> 6.4 MEDIUM

## Beschreibung

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space which allows attackers to edit a subscription for a Confluence space the user does not have access for via edit subscription endpoint.

## CNA-Record (Kanon, cvelistV5)

- CNA: **Mattermost**
- State: PUBLISHED
- Stand: 2025-08-11 19:35:23
- CNA-CVSS: **6.4** (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N`)

## 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:C/C:L/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 | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Schwachstellen-Klasse

- **CWE-862** — Missing Authorization
  The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

## Angriffsmuster (CAPEC)

- [CAPEC-665 — Exploitation of Thunderbolt Protection Flaws](https://capec.mitre.org/data/definitions/665.html) _(Severity: Very High)_

## ATT&CK-Techniken

- [T1211 — Exploitation for Defensive Evasion](https://attack.mitre.org/techniques/T1211/)
- [T1542.002 — Pre-OS Boot: Component Firmware](https://attack.mitre.org/techniques/T1542/002/)
- [T1556 — Modify Authentication Process](https://attack.mitre.org/techniques/T1556/)

## Patch verfügbar (OSV)

- eccd0fdb6730a5a2e5a8e3f9636b27122f024e47 (Commit)

## BSI-Hinweise (deutsch)

- [Mattermost Plugins: Mehrere Schwachstellen ermöglichen Umgehung von Sicherheitsmechanismen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2025-1663) — _BSI-Einstufung: mittel_
  Ein Angreifer kann mehrere Schwachstellen im Mattermost Confluence Plugin ausnutzen, um Sicherheitsmechanismen zu umgehen.

## Referenzen

- <https://mattermost.com/security-updates>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2025-48731/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_