CVE-2021-39201: Authenticated cross-site scripting (XSS) in WordPress editor
First published: Thu Sep 09 2021(Updated: )
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)
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/wordpress | 5.0.15+dfsg1-0+deb10u1 5.0.19+dfsg1-0+deb10u1 5.7.8+dfsg1-0+deb11u2 6.1.1+dfsg1-1 6.3.1+dfsg1-1 | |
| debian/wordpress | <=5.0.12+dfsg1-0+deb10u1<=5.7.1+dfsg1-2 | 5.8.1+dfsg1-1 5.0.14+dfsg1-0+deb10u1 5.7.3+dfsg1-0+deb11u1 |
| WordPress WordPress | >=5.0<5.8 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 |
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Reference Links
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-wh69-25hr-h94v
- https://security-tracker.debian.org/tracker/CVE-2021-39201
- https://wordpress.org/news/category/releases/
- https://hackerone.com/reports/1142140
- https://hackerone.com/wordpress
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39201
- https://salsa.debian.org/debian/wordpress/-/commit/64d5308a644d0f97c5006c3cc78840b270718094
- https://security-tracker.debian.org/tracker/CVE-2021-39200
- https://bugs.debian.org/994059
- https://bugs.debian.org/994060
- https://wordpress.org/news/2021/09/wordpress-5-8-1-security-and-maintenance-release/
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=994059
- https://www.debian.org/security/2021/dsa-4985
Frequently Asked Questions
What is CVE-2021-39201?
CVE-2021-39201 is a vulnerability in WordPress that allows an authenticated but low-privileged user to execute XSS in the editor.
What is the impact of CVE-2021-39201?
The impact of CVE-2021-39201 is that it bypasses the restrictions imposed on users and allows for the execution of XSS in the editor.
Which versions of WordPress are affected by CVE-2021-39201?
WordPress versions 5.0 to 5.8 are affected by CVE-2021-39201.
How can I fix CVE-2021-39201 in Debian Linux?
You can fix CVE-2021-39201 in Debian Linux by updating to version 10.0 or 11.0.
Where can I find more information about CVE-2021-39201?
You can find more information about CVE-2021-39201 in the following references: [link1], [link2], [link3].
- collector/security-tracker-debian
- collector/debian-bugs
- alias/CVE-2021-39201
- agent/type
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/author
- agent/references
- agent/weakness
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/title
- agent/severity
- agent/tags
- agent/first-publish-date
- agent/event
- package-manager/debian
- vendor/wordpress
- canonical/wordpress wordpress
- version/wordpress wordpress/5.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- version/debian debian linux/11.0