CVE-2021-39202 WordPress 5.8 beta: Stored Cross-Site Scripting (XSS) vulnerability in widget

2021-09-0921:55:11

CWE-79

GitHub_M

www.cve.org

wordpress

cross-site scripting

mysql

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

7.3

Confidence

High

EPSS

0.001

Percentile

22.7%

JSON

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.

CNA Affected

[
  {
    "product": "wordpress-develop",
    "vendor": "WordPress",
    "versions": [
      {
        "status": "affected",
        "version": "5.8 beta 1"
      },
      {
        "status": "affected",
        "version": "5.8 beta 2"
      }
    ]
  }
]