CVE-2020-4046 Information

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).

CVSS Vector

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

Reference

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rpwf-hrh2-39jf https://lists.debian.org/debian-lts-announce/2020/07/msg00000.html https://lists.fedoraproject.org/archives/list/[email protected]/message/773N2ZV7QEMBGKH6FBKI6Q5S3YJMW357/ https://lists.fedoraproject.org/archives/list/[email protected]/message/ODNHXVJS25YVWYQHOCICXTLIN5UYJFDN/ https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release/ https://www.debian.org/security/2020/dsa-4709

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4