medium
6
CWE
288
Advisory Published
Updated

CVE-2020-4050: set-screen-option filter misuse by plugins leading to privilege escalation in WordPress

First published: Fri Jun 12 2020(Updated: )

In affected versions of WordPress, misuse of the `set-screen-option` filter's return value allows arbitrary user meta fields to be saved. It does require an admin to install a plugin that would misuse the filter. Once installed, it can be leveraged by low privileged users. 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=31
Fedoraproject Fedora=32
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Debian Debian Linux=10.0

Remedy

https://github.com/WordPress/wordpress-develop/commit/b8dea76b495f0072523106c6ec46b9ea0d2a0920

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Reference Links

Frequently Asked Questions

  • What is CVE-2020-4050?

    CVE-2020-4050 is a vulnerability in WordPress that allows arbitrary user meta fields to be saved.

  • What is the severity of CVE-2020-4050?

    The severity of CVE-2020-4050 is medium, with a severity value of 3.1.

  • How does CVE-2020-4050 affect WordPress?

    CVE-2020-4050 affects certain versions of WordPress where the `set-screen-option` filter's return value can be misused.

  • What is the remedy for CVE-2020-4050?

    The remedy for CVE-2020-4050 is to update to the patched versions of WordPress, such as 5.0.15+dfsg1-0+deb10u1 or 5.0.19+dfsg1-0+deb10u1.

  • Where can I find more information about CVE-2020-4050?

    You can find more information about CVE-2020-4050 in the references provided: [link 1](https://core.trac.wordpress.org/changeset/47951) and [link 2](https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-4vpv-fgg2-gcqc).

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