CVE-2019-16781

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

In WordPress before 5.3.1, authenticated users with lower privileges (like contributors) can inject JavaScript code in the block editor, which is executed within the dashboard. It can lead to an admin opening the affected post in the editor leading to XSS.

En WordPress versiones anteriores a 5.3.1, los usuarios autenticados con privilegios más bajos (como los contribuyentes) pueden inyectar código JavaScript en el editor de bloques, que es ejecutado dentro del panel. Puede conllevar a un administrador a abrir la publicación afectada en el editor conllevando a un ataque de tipo XSS.

Several vulnerabilities were discovered in Wordpress, a web blogging tool. They allowed remote attackers to perform various Cross-Side Scripting (XSS) and Cross-Site Request Forgery (CSRF) attacks, create files on the server, disclose private information, create open redirects, poison cache, and bypass authorization access and input sanitation.

*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
2024-08-05 CVE Updated
2025-03-30 EPSS 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 (6)

URL	Tag	Source
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-pg4x-64rh-3c9v	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

URL	Date	SRC
https://www.debian.org/security/2020/dsa-4599	2023-01-19
https://www.debian.org/security/2020/dsa-4677	2023-01-19

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"				< 5.3.1 Search vendor "Wordpress" for product "Wordpress" and version " < 5.3.1"		-		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