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CVE-2021-39201

Authenticated cross-site scripting (XSS) in WordPress editor

Published: Sep 9, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-79
NVD MITRE
7.6CVSSHIGH
EPSS Score
1.5%
Top 29.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
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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)

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:HI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
WordPressWordPress FoundationWeb & CMS Plugins
wordpress-developWordPressWeb & CMS Plugins
wordpresswordpress
On-premWeb App
Web & CMS Plugins / cms-core
debian linuxdebian
On-premOS
Operating Systems / linux-distro
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
wordpress foundationoss-projectUSWeb & CMS Plugins
wordpressoss-projectUSWeb & CMS Pluginsaka wp, wordpress.org, wordpress mu
debianoss-projectGBOperating Systemsaka debian gnu/linux

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://hackerone.com/reports/1142140
hackerone.com
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-wh69-25hr-h94v
github.com
https://www.debian.org/security/2021/dsa-4985
debian.org

Timeline

Published
Sep 9, 2021
Last Updated
Nov 21, 2024

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