CVE-2021-39202

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

CVSS 7.6 HIGHEPSS 0.8%CWE-79

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.6EPSS 0.8%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

09 Sep 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Affected products

WordPress · wordpress-develop

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References

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-fr6h-3855-j297 https://hackerone.com/reports/1222797