CVE-2021-39201 Authenticated cross-site scripting (XSS) in WordPress editor

2021-09-0921:35:08

CWE-79

GitHub_M

www.cve.org

cve-2021-39201

authenticated

cross-site scripting

wordpress

editor

php

mysql

mariadb

xss

patches

restrictions

unfiltered_html

updates

hackerone

CVSS3

7.6

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

6.4

Confidence

High

EPSS

0.001

Percentile

43.7%

JSON

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

CNA Affected

[
  {
    "product": "wordpress-develop",
    "vendor": "WordPress",
    "versions": [
      {
        "status": "affected",
        "version": ">= 5.0, < 5.8.0"
      }
    ]
  }
]