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

CVE-2021-39202
7.6HIGH

Key Information

Vendor
WordPress
Status
WordPress-develop
Vendor
CVE Published:
9 September 2021

Summary

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.

Affected Version(s)

wordpress-develop = 5.8 beta 1

wordpress-develop = 5.8 beta 2

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Risk change from: 5.4 to: 7.6 - (HIGH)

  • Vulnerability published.

  • Vulnerability Reserved.

Collectors

NVD DatabaseMitre Database
.