CVE-2021-28117

low

Published — · Modified —

CVSS v3

—

CVSS v2

—

VIR risk

2.5

Description

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.)

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-28117

OS impact

OS	Version	Status	Fixed in
arch		fixed	`5.21.3-1`
debian	bookworm	fixed	`5.20.5-3`
debian	bullseye	fixed	`5.20.5-3`
debian	forky	fixed	`5.20.5-3`
debian	sid	fixed	`5.20.5-3`
debian	trixie	fixed	`5.20.5-3`

References

https://security-tracker.debian.org/tracker/CVE-2021-28117

Verify integrity in audit chain (admin only). AS-IS.