medium
6.8
CWE
80
Advisory Published
Updated

CVE-2020-4047: Authenticated XSS via media attachment page in WordPress

First published: Fri Jun 12 2020(Updated: )

In affected versions of WordPress, authenticated users with upload permissions (like authors) are able to inject JavaScript into some media file attachment pages in a certain way. This can lead to script execution in the context of a higher privileged user when the file is viewed by them. 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).

Credit: security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
debian/wordpress
5.0.15+dfsg1-0+deb10u1
5.0.19+dfsg1-0+deb10u1
5.7.8+dfsg1-0+deb11u2
6.1.1+dfsg1-1
6.3.1+dfsg1-1
WordPress WordPress>=3.7<3.7.34
WordPress WordPress>=3.8<3.8.34
WordPress WordPress>=3.9<3.9.32
WordPress WordPress>=4.0<4.0.31
WordPress WordPress>=4.1<4.1.31
WordPress WordPress>=4.2<4.2.28
WordPress WordPress>=4.3<4.3.24
WordPress WordPress>=4.4<4.4.23
WordPress WordPress>=4.5<4.5.22
WordPress WordPress>=4.6<4.6.19
WordPress WordPress>=4.7<4.7.18
WordPress WordPress>=4.8<4.8.14
WordPress WordPress>=4.9<4.9.15
WordPress WordPress>=5.0<5.0.10
WordPress WordPress>=5.1<5.1.6
WordPress WordPress>=5.2<5.2.7
WordPress WordPress>=5.3.0<5.3.4
WordPress WordPress>=5.4<5.4.2
Fedoraproject Fedora=32
Fedoraproject Fedora=33
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Debian Debian Linux=10.0

Remedy

https://github.com/WordPress/wordpress-develop/commit/0977c0d6b241479ecedfe19e96be69f727c3f81f

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Reference Links

Frequently Asked Questions

  • What is the vulnerability CVE-2020-4047?

    The vulnerability CVE-2020-4047 allows authenticated users with upload permissions to inject JavaScript into media file attachment pages, leading to script execution in the context of a higher privileged user.

  • What software versions are affected by CVE-2020-4047?

    WordPress versions 3.7 to 5.0.15, 5.0.19 to 5.7.8, 6.1.1 to 6.3.1, and some Debian and Fedoraproject versions are affected by CVE-2020-4047.

  • How severe is the vulnerability CVE-2020-4047?

    The severity of the vulnerability CVE-2020-4047 is medium with a CVSS score of 6.8.

  • How can I fix the vulnerability CVE-2020-4047?

    To fix the vulnerability CVE-2020-4047, update your WordPress installation to a version that includes the security patch.

  • Where can I find more information about the vulnerability CVE-2020-4047?

    You can find more information about the vulnerability CVE-2020-4047 on the WordPress Core Trac and GitHub security advisories.

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