CVE-2021-39202

HIGH

WordPress 5.8 beta 1 - Stored Cross-Site Scripting in Custom HTML Widget

Title source: llm
STIX 2.1

Description

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.

References (2)

Core 2
Core References
Permissions Required x_refsource_misc
https://hackerone.com/reports/1222797

Scores

CVSS v3 7.6
EPSS 0.0082
EPSS Percentile 74.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
wordpress/wordpress 5.8 beta1 (2 CPE variants)
Published Sep 09, 2021
Tracked Since Feb 18, 2026