CVE-2021-3660

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-03-10 · updated 2026-06-17
Weakness: CWE-1021

Description

Cockpit (and its plugins) do not seem to protect itself against clickjacking. It is possible to render a page from a cockpit server via another website, inside an <iFrame> HTML entry. This may be used by a malicious website in clickjacking or similar attacks.

Affected products

Cockpit-Project Cockpit: before 254 — fixed in 254
Red Hat Enterprise Linux: 8.0

How to fix

Upgrade to a fixed version: Cockpit-Project Cockpit 254. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1980688
https://github.com/cockpit-project/cockpit/commit/8d9bc10d8128aae03dfde62fd00075fe492ead10
https://github.com/cockpit-project/cockpit/issues/16122
https://bugzilla.redhat.com/show_bug.cgi?id=1980688
https://github.com/cockpit-project/cockpit/commit/8d9bc10d8128aae03dfde62fd00075fe492ead10
https://github.com/cockpit-project/cockpit/issues/16122

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