CVE-2021-3660

Name: CVE-2021-3660
Creator: NVD / NIST
Published: 2022-03-10T17:42:55.647+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.22%

Last modified Jun 17, 2026

CVE-2021-3660 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS Probability

1.22%

64.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cockpit-Project	Cockpit	< 254
Redhat	Enterprise Linux	8.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1980688Issue Tracking, Third Party Advisory
https://github.com/cockpit-project/cockpit/commit/8d9bc10d8128aae03dfde62fd00075fe492ead10Patch, Third Party Advisory
https://github.com/cockpit-project/cockpit/issues/16122Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1980688Issue Tracking, Third Party Advisory
https://github.com/cockpit-project/cockpit/commit/8d9bc10d8128aae03dfde62fd00075fe492ead10Patch, Third Party Advisory
https://github.com/cockpit-project/cockpit/issues/16122Patch, Third Party Advisory

Timeline

Published: Mar 10, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3660?

How severe is CVE-2021-3660?

CVE-2021-3660 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3660?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3660?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST