// For flags

CVE-2021-39202

WordPress 5.8 beta: Stored Cross-Site Scripting (XSS) vulnerability in widget

Severity Score

5.4
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. In affected versions the widgets editor introduced in WordPress 5.8 beta 1 has improper handling of HTML input in the Custom HTML feature. This leads to stored XSS in the custom HTML widget. This has been patched in WordPress 5.8. It was only present during the testing/beta phase of WordPress 5.8.

WordPress es un sistema de administración de contenidos gratuito y de código abierto escrito en PHP y emparejado con una base de datos MySQL o MariaDB. En versiones afectadas, el editor de widgets introducido en la versión 5.8 beta 1 de WordPress, presenta un manejo inapropiado de la entrada HTML en la funcionalidad Custom HTML. Esto conlleva a una vulnerabilidad de tipo XSS almacenado en el widget de HTML personalizado. Esto ha sido parcheado en WordPress versión 5.8. Sólo estuvo presente durante la fase de pruebas/beta de WordPress versión 5.8

*Credits: Evan Ricafort
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
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
Low
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
  • 2021-08-16 CVE Reserved
  • 2021-09-09 CVE Published
  • 2023-04-02 EPSS Updated
  • 2024-08-04 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
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"
 5.8
Search vendor "Wordpress" for product "Wordpress" and version "5.8"
beta1
Affected
Wordpress
Search vendor "Wordpress"
 Wordpress
Search vendor "Wordpress" for product "Wordpress"
 5.8
Search vendor "Wordpress" for product "Wordpress" and version "5.8"
beta2
Affected