CVE-2021-28117: Kde Discover

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

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.)

Affected products

• Kde Discover: before 5.21.3 (fixed in 5.21.3)

Published 2021-03-20. Last modified 2026-06-17.