---
cve: "CVE-2024-37903"
severity: "HIGH"
cvss: 8.2
epss: "53%"
vendor: "mastodon"
kev: false
exploited: false
published: "2024-07-05 18:15:32"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T01:09:59+02:00"
---

# CVE-2024-37903

> 8.2 HIGH · 🧪 PoC

## Beschreibung

Mastodon is a self-hosted, federated microblogging platform. Starting in version 2.6.0 and prior to versions 4.1.18 and 4.2.10, by crafting specific activities, an attacker can extend the audience of a post they do not own to other Mastodon users on a target server, thus gaining access to the contents of a post not intended for them. Versions 4.1.18 and 4.2.10 contain a patch for this issue.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- ff90ebffaa80bb48d12a838d9a4f82fa7edb602b (Commit)
- a5b4a2b7e71aedd2f04bc7a90f79dfe234fa7f89 (Commit)

## Referenzen

- <https://github.com/mastodon/mastodon/security/advisories/GHSA-xjvf-fm67-4qc3>
- <https://github.com/mastodon/mastodon/commit/a1c7aae28aecf06659c5b18cfa131b37cd1512a3>
- <https://github.com/mastodon/mastodon/commit/d4bf22b632ea8b1174375c4966a6768ab66393b6>
- <https://github.com/mastodon/mastodon/releases/tag/v4.1.18>
- <https://github.com/mastodon/mastodon/releases/tag/v4.2.10>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-37903) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_