CVE-2021-39201
wordpress - security update
Description
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. ### Impact The issue allows an authenticated but low-privileged user (like contributor/author) to execute XSS in the editor. This bypasses the restrictions imposed on users who do not have the permission to post `unfiltered_html`. ### Patches This has been patched in WordPress 5.8, and will be pushed to older versions via minor releases (automatic updates). It's strongly recommended that you keep auto-updates enabled to receive the fix. ### References https://wordpress.org/news/category/releases/ https://hackerone.com/reports/1142140 ### For more information If you have any questions or comments about this advisory: * Open an issue in [HackerOne](https://hackerone.com/wordpress)
How to fix CVE-2021-39201
To remediate CVE-2021-39201, upgrade the affected package to a fixed version below.
- —upgrade to 5.8.0 or later
- —upgrade to 5.8.0 or later
- —upgrade to 5.7.3+dfsg1-0+deb11u1 or later
- —upgrade to 5.0.14+dfsg1-0+deb10u1 or later
Is CVE-2021-39201 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- >= 5.0.0, < 5.8.0
- >= 5.0.0, < 5.8.0
- from 0, < 5.7.3+dfsg1-0+deb11u1
- from 0, < 5.0.14+dfsg1-0+deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |