CVE-2020-4049

LOW2.4EPSS 5.9%

Authenticated self-XSS via theme uploads in WordPress

Published: 6/12/2020Modified: 5/27/2026

Description

In affected versions of WordPress, when uploading themes, the name of the theme folder can be crafted in a way that could lead to JavaScript execution in /wp-admin on the themes page. This does require an admin to upload the theme, and is low severity self-XSS. 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).

Affected packages (3)

  • Bitnami/wordpress>= 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
  • Bitnami/wordpress-multisite>= 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
  • Debian/wordpressfrom 0, < 5.4.2+dfsg1-1

CVSS scores

SourceVersionSeverityVector
osvCVSS 3.1LOW2.4CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

References (10)