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

What is CVE-2021-39202?

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.

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Affected Version(s)

wordpress-develop 5.8 beta 1

wordpress-develop 5.8 beta 2

References

https://github.com/WordPress/wordpress-develop/security/a...
x_refsource_CONFIRM
https://hackerone.com/reports/1222797
x_refsource_MISC

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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