CVE-2020-4046 Authenticated XSS through embed block in WordPress

2020-06-1215:55:12

CWE-80

GitHub_M

www.cve.org

5.4 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

5.7 Medium

AI Score

Confidence

High

0.004 Low

EPSS

Percentile

73.8%

JSON

In affected versions of WordPress, users with low privileges (like contributors and authors) can use the embed block in a certain way to inject unfiltered HTML in the block editor. When affected posts are viewed by a higher privileged user, this could lead to script execution in the editor/wp-admin. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).

CNA Affected

[
  {
    "product": "wordpress-develop",
    "vendor": "WordPress",
    "versions": [
      {
        "status": "affected",
        "version": ">= 5.4.0, < 5.4.2"
      },
      {
        "status": "affected",
        "version": ">= 5.3.0, < 5.3.4"
      },
      {
        "status": "affected",
        "version": ">= 5.2.0, < 5.2.7"
      },
      {
        "status": "affected",
        "version": ">= 5.1.0, < 5.1.6"
      },
      {
        "status": "affected",
        "version": ">= 5.0.0, < 5.0.10"
      },
      {
        "status": "affected",
        "version": ">= 4.9.0, < 4.9.15"
      },
      {
        "status": "affected",
        "version": ">= 4.8.0, < 4.8.14"
      },
      {
        "status": "affected",
        "version": ">= 4.7.0, < 4.7.18"
      },
      {
        "status": "affected",
        "version": ">= 4.6.0, < 4.6.19"
      },
      {
        "status": "affected",
        "version": ">= 4.5.0, < 4.5.22"
      },
      {
        "status": "affected",
        "version": ">= 4.4.0, < 4.4.23"
      },
      {
        "status": "affected",
        "version": ">= 4.3.0, < 4.3.24"
      },
      {
        "status": "affected",
        "version": ">= 4.2.0, < 4.2.28"
      },
      {
        "status": "affected",
        "version": ">= 4.1.0, < 4.1.31"
      },
      {
        "status": "affected",
        "version": ">= 4.0.0, < 4.0.31"
      },
      {
        "status": "affected",
        "version": ">= 3.9.0, < 3.9.32"
      },
      {
        "status": "affected",
        "version": ">= 3.8.0, < 3.8.34"
      },
      {
        "status": "affected",
        "version": ">= 3.7.0, < 3.7.34"
      }
    ]
  }
]