---
cve: "CVE-2021-28117"
severity: "HIGH"
cvss: 7.5
epss: "1.6%"
vendor: "n/a"
kev: false
exploited: false
published: "2021-03-20 00:00:00"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T09:09:15+02:00"
---

# CVE-2021-28117

> 7.5 HIGH · 🧪 PoC

## Beschreibung

libdiscover/backends/KNSBackend/KNSResource.cpp in KDE Discover before 5.21.3 automatically creates links to potentially dangerous URLs (that are neither https:// nor http://) based on the content of the store.kde.org web site. (5.18.7 is also a fixed version.)

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 | Keine | good |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- d96cf4bd89ca0572d0941cf63d93169e805e2780 (Commit)
- fcd3b30552bf03a384b1a16f9bb8db029c111356 (Commit)

## Referenzen

- <https://userbase.kde.org/Discover>
- <https://github.com/KDE/discover/releases>
- <https://kde.org/info/security/advisory-20210310-1.txt>
- <https://invent.kde.org/plasma/discover/commit/94478827aab63d2e2321f0ca9ec5553718798e60>
- <https://github.com/KDE/discover/commit/fcd3b30552bf03a384b1a16f9bb8db029c111356>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-28117) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_