UpHeron
All vulnerabilities

WordPress core

CVE-2020-4046

WordPress: Authenticated XSS through embed block

Severity
Medium 5.4
Published
12 Jun 2020
Last changed
17 Jun 2026
Added to UpHeron
17 Oct 2026
Fixed in
4.9.15, 5.0.10, 5.1.6, 5.2.7, 5.3.4, 5.4.2
Also known as
GHSA-rpwf-hrh2-39jf
Sources
NVD, WordPress

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…

Affected software

SoftwareAffected versions
WordPressWordPress core · cpe:a:wordpress:wordpress
  • From 5.4 before 5.4.2
  • From 5.3.0 before 5.3.4
  • From 5.2 before 5.2.7
  • From 5.1 before 5.4.2
All 19 release lines
  • From 3.7 before 3.7.34
  • From 3.8 before 3.8.34
  • From 3.9 before 3.9.32
  • From 4.0 before 4.0.31
  • From 4.1 before 4.1.31
  • From 4.2 before 4.2.28
  • From 4.3 before 4.3.24
  • From 4.4 before 4.4.23
  • From 4.5 before 4.5.22
  • From 4.6 before 4.6.19
  • From 4.7 before 4.7.18
  • From 4.8 before 4.8.14
  • From 4.9 before 4.9.15
  • From 5.0 before 5.0.10
  • From 5.1 before 5.1.6
  • From 5.1 before 5.4.2
  • From 5.2 before 5.2.7
  • From 5.3.0 before 5.3.4
  • From 5.4 before 5.4.2

References