---
cve: "CVE-2025-52559"
severity: "MEDIUM"
cvss: 6.8
epss: "0.2%"
vendor: "zulip"
kev: false
exploited: false
published: "2025-07-02 19:31:12"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:08:41+02:00"
---

# CVE-2025-52559

> 6.8 MEDIUM · 🧪 PoC

## Beschreibung

Zulip is an open-source team chat application. From versions 2.0.0-rc1 to before 10.4 in Zulip Server, the /digest/ URL of a server shows a preview of what the email weekly digest would contain. This URL, though not the digest itself, contains a cross-site scripting (XSS) vulnerability in both topic names and channel names. This issue has been fixed in Zulip Server 10.4. A workaround for this issue involves denying access to /digest/.

## CVSS-Vektor

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

| 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 | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- ad6867b6cc1e5eac5a005f51cadf870317f5a948 (Commit)
- 175ec1f365b0db982d6eac9019701cbf6e8bc2f2 (Commit)

## Referenzen

- <https://github.com/zulip/zulip/security/advisories/GHSA-vgf2-vw4r-m663>
- <https://github.com/zulip/zulip/commit/175ec1f365b0db982d6eac9019701cbf6e8bc2f2>
- <https://github.com/zulip/zulip/commit/1a8429e338ff53bdcc4b42e7e71b6fffdd84fcd1>
- <https://github.com/zulip/zulip/commit/6608c8777254e73a4b540e5e1c4af92e680a55fc>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-52559) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_