CVE-2020-4046

Authenticated XSS through embed block in WordPress

State: Published
Severity: 5.4 Medium
Published: Jun 12, 2020
Updated: Aug 4, 2024
Reserved: Dec 30, 2019

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).

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Affected Products

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

Product

Versions

wordpress-developWordPress

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

References

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rpwf-hrh2-39jf
https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release/
FEDORA-2020-8447a3e195vendor-advisory
FEDORA-2020-bbedd29391vendor-advisory
DSA-4709vendor-advisory
[debian-lts-announce] 20200701 [SECURITY] [DLA 2269-1] wordpress security updatemailing-list

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