---
cve: "CVE-2024-56136"
severity: "MEDIUM"
cvss: 6.9
epss: "0.6%"
vendor: "zulip"
kev: false
exploited: false
published: "2025-01-16 20:15:33"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T19:54:44+02:00"
---

# CVE-2024-56136

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can make a request and determine if an email address is in use by a user. Zulip Server 9.4 resolves the issue, as does the `main` branch of Zulip Server. Users are advised to upgrade. There are no known workarounds for this issue.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- b762cdde481456c39a09602f1d7e0e898bdbd876 (Commit)
- c6334a765b1e6d71760e4a3b32ae5b8367f2ed4d (Commit)

## Referenzen

- <https://github.com/zulip/zulip/security/advisories/GHSA-5xg8-xhfj-4hm6>
- <https://github.com/zulip/zulip/commit/c6334a765b1e6d71760e4a3b32ae5b8367f2ed4d>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-56136) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_