CVE-2021-39202

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

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.

Category

7.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.82% Top 30%
Third-Party Advisory github.com
Affected: WordPress wordpress-develop
Published at:
Updated at:

References

Link Tags
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-fr6h-3855-j297 third party advisory
https://hackerone.com/reports/1222797 permissions required

Frequently Asked Questions

What is the severity of CVE-2021-39202?
CVE-2021-39202 has been scored as a high severity vulnerability.
How to fix CVE-2021-39202?
To fix CVE-2021-39202, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-39202 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-39202 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-39202?
CVE-2021-39202 affects WordPress wordpress-develop.
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