CVE-2020-4046

Description

In affected versions of WordPress, users with low privileges (like contributors and authors) can use the embed block in a certain way to inject unfiltered HTML in the block editor. When affected posts are viewed by a higher privileged user, this could lead to script execution in the editor/wp-admin. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).

How to fix CVE-2020-4046

To remediate CVE-2020-4046, upgrade the affected package to a fixed version below.

—upgrade to 3.7.34 or later
—upgrade to 3.7.34 or later
—upgrade to 5.4.2+dfsg1-1 or later

Is CVE-2020-4046 being exploited?

Moderate — EPSS is 6.9%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (3)

>= 3.7.0, < 3.7.34, >= 3.8.0, < 3.8.34, >= 3.9.0, < 3.9.32, >= 4.0.0, < 4.0.31, >= 4.1.0, < 4.1.31, >= 4.2.0, < 4.2.28, >= 4.3.0, < 4.3.24, >= 4.4.0, < 4.4.23, >= 4.5.0, < 4.5.22, >= 4.6.0, < 4.6.19, >= 4.7.0, < 4.7.18, >= 4.8.0, < 4.8.14, >= 4.9.0, < 4.9.15, >= 5.0.0, < 5.0.10, >= 5.1.0, < 5.1.6, >= 5.2.0, < 5.2.7, >= 5.3.0, < 5.3.4, >= 5.4.0, < 5.4.2
>= 3.7.0, < 3.7.34, >= 3.8.0, < 3.8.34, >= 3.9.0, < 3.9.32, >= 4.0.0, < 4.0.31, >= 4.1.0, < 4.1.31, >= 4.2.0, < 4.2.28, >= 4.3.0, < 4.3.24, >= 4.4.0, < 4.4.23, >= 4.5.0, < 4.5.22, >= 4.6.0, < 4.6.19, >= 4.7.0, < 4.7.18, >= 4.8.0, < 4.8.14, >= 4.9.0, < 4.9.15, >= 5.0.0, < 5.0.10, >= 5.1.0, < 5.1.6, >= 5.2.0, < 5.2.7, >= 5.3.0, < 5.3.4, >= 5.4.0, < 5.4.2
from 0, < 5.4.2+dfsg1-1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N