CVE-2020-4050

set-screen-option filter misuse by plugins leading to privilege escalation in WordPress

Severity Score

3.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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).

En las versiones afectadas de WordPress, el uso incorrecto del valor de retorno del filtro "set-screen-option", permite que campos meta arbitrarios del usuario sean guardados. Requiere que un administrador instale un plugin que pueda usar incorrectamente el filtro. Una vez instalado, pueden ser aprovechados por los usuarios con poco privilegiados. Esto ha sido parcheado en la versión 5.4.2, junto con todas las versiones afectadas anteriormente por medio de una versión menor (versiones 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)

*Credits: Simon Scannell

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-30 CVE Reserved
2020-06-10 CVE Published
2024-08-04 CVE Updated
2024-10-06 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-288: Authentication Bypass Using an Alternate Path or Channel

CAPEC

References (8)

URL	Tag	Source
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-4vpv-fgg2-gcqc	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00000.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/09/msg00011.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://github.com/WordPress/wordpress-develop/commit/b8dea76b495f0072523106c6ec46b9ea0d2a0920	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/773N2ZV7QEMBGKH6FBKI6Q5S3YJMW357	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODNHXVJS25YVWYQHOCICXTLIN5UYJFDN	2023-11-07
https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release	2023-11-07
https://www.debian.org/security/2020/dsa-4709	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 3.7 < 3.7.34 Search vendor "Wordpress" for product "Wordpress" and version " >= 3.7 < 3.7.34"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 3.8 < 3.8.34 Search vendor "Wordpress" for product "Wordpress" and version " >= 3.8 < 3.8.34"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 3.9 < 3.9.32 Search vendor "Wordpress" for product "Wordpress" and version " >= 3.9 < 3.9.32"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.0 < 4.0.31 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.0 < 4.0.31"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.1 < 4.1.31 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.1 < 4.1.31"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.2 < 4.2.28 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.2 < 4.2.28"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.3 < 4.3.24 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.3 < 4.3.24"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.4 < 4.4.23 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.4 < 4.4.23"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.5 < 4.5.22 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.5 < 4.5.22"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.6 < 4.6.19 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.6 < 4.6.19"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.7 < 4.7.18 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.7 < 4.7.18"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.8 < 4.8.14 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.8 < 4.8.14"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 4.9 < 4.9.15 Search vendor "Wordpress" for product "Wordpress" and version " >= 4.9 < 4.9.15"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 5.0 < 5.0.10 Search vendor "Wordpress" for product "Wordpress" and version " >= 5.0 < 5.0.10"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 5.1 < 5.1.6 Search vendor "Wordpress" for product "Wordpress" and version " >= 5.1 < 5.1.6"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 5.2 < 5.2.7 Search vendor "Wordpress" for product "Wordpress" and version " >= 5.2 < 5.2.7"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 5.3.0 < 5.3.4 Search vendor "Wordpress" for product "Wordpress" and version " >= 5.3.0 < 5.3.4"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				>= 5.4 < 5.4.2 Search vendor "Wordpress" for product "Wordpress" and version " >= 5.4 < 5.4.2"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				31 Search vendor "Fedoraproject" for product "Fedora" and version "31"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected