CVE-2019-16780

Stored cross-site scripting (XSS) in WordPress block editor

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

WordPress users with lower privileges (like contributors) can inject JavaScript code in the block editor using a specific payload, which is executed within the dashboard. This can lead to XSS if an admin opens the post in the editor. Execution of this attack does require an authenticated user. This has been patched in WordPress 5.3.1, along with all the previous WordPress versions from 3.7 to 5.3 via a minor release. Automatic updates are enabled by default for minor releases and we strongly recommend that you keep them enabled.

Los usuarios de WordPress con privilegios más bajos (como los contribuyentes) pueden inyectar código JavaScript en el editor de bloques usando una carga útil específica, que es ejecutada dentro del panel. Esto puede conllevar a un ataque de tipo XSS si un administrador abre la publicación en el editor. La ejecución de este ataque requiere de un usuario autenticado. Esto ha sido parcheado en WordPress versión 5.3.1, junto con todas las versiones anteriores de WordPress desde 3.7 hasta 5.3 por medio de una versión menor. Las actualizaciones automáticas están habilitadas por defecto para versiones menores y recomendamos encarecidamente que las mantenga habilitadas.

*Credits: Nguyen Van Khanh

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-09-24 CVE Reserved
2019-12-13 CVE Published
2023-03-07 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (7)

URL	Tag	Source
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-x3wp-h3qx-9w94	Third Party Advisory
https://seclists.org/bugtraq/2020/Jan/8	Mailing List
https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release	Release Notes
https://wpvulndb.com/vulnerabilities/9976	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/WordPress/wordpress-develop/commit/505dd6a20b6fc3d06130018c1caeff764248c29e	2022-11-23

URL	Date	SRC
https://www.debian.org/security/2020/dsa-4599	2022-11-23
https://www.debian.org/security/2020/dsa-4677	2022-11-23

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 < 5.3.1 Search vendor "Wordpress" for product "Wordpress" and version " > 3.7 < 5.3.1"		-		Affected
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				3.7 Search vendor "Wordpress" for product "Wordpress" and version "3.7"		-		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