---
cve: "CVE-2025-66376"
severity: "HIGH"
cvss: 7.2
epss: "22%"
vendor: "Zimbra"
kev: true
exploited: true
published: "2026-01-05 15:15:44"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T16:20:30+02:00"
---

# CVE-2025-66376

> 7.2 HIGH · ⚠️ CISA KEV (174 Tage) · 🔓 Exploited

## Beschreibung

Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.

## CVSS-Vektor

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

## Patch verfügbar (OSV)

- c2fac09a3333bcb767866afa3203541da2e8729c (Commit)
- 1884e94c76d9602c75dff36c9ff9a5ec2224c582 (Commit)

## Referenzen

- <https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories>
- <https://wiki.zimbra.com/wiki/Security_Center>
- <https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy>
- <https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.13#Security_Fixes>
- <https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.18#Security_Fixes>
- <https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66376>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-66376) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_