---
cve: "CVE-2026-20915"
severity: "HIGH"
cvss: 8.5
epss: "15%"
vendor: "Checkmk GmbH"
kev: false
exploited: false
published: "2026-03-31 15:16:11"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T03:18:46+02:00"
---

# CVE-2026-20915

> 8.5 HIGH

## Beschreibung

Stored cross-site scripting (XSS) in Checkmk version 2.5.0 (beta) before 2.5.0b2 allows authenticated users with permission to create pending changes to inject malicious JavaScript into the Pending Changes sidebar, which will execute in the browsers of other users viewing the sidebar.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |

## Referenzen

- <https://checkmk.com/werk/19526>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-20915) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_