UBUNTU-CVE-2021-44223

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Source
https://ubuntu.com/security/CVE-2021-44223
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-44223.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-44223
Upstream
Published
2021-11-25T15:15:00Z
Modified
2025-09-08T16:47:25Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

WordPress before 5.8 lacks support for the Update URI plugin header. This makes it easier for remote attackers to execute arbitrary code via a supply-chain attack against WordPress installations that use any plugin for which the slug satisfies the naming constraints of the WordPress.org Plugin Directory but is not yet present in that directory.

References

Affected packages

Ubuntu:Pro:16.04:LTS / wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress@4.4.2+dfsg-1ubuntu1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.3+dfsg-1
4.3.1+dfsg-1
4.4+dfsg-1
4.4.1+dfsg-1
4.4.2+dfsg-1
4.4.2+dfsg-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.4.2+dfsg-1ubuntu1",
            "binary_name": "wordpress"
        },
        {
            "binary_version": "4.4.2+dfsg-1ubuntu1",
            "binary_name": "wordpress-l10n"
        },
        {
            "binary_version": "4.4.2+dfsg-1ubuntu1",
            "binary_name": "wordpress-theme-twentyfifteen"
        },
        {
            "binary_version": "4.4.2+dfsg-1ubuntu1",
            "binary_name": "wordpress-theme-twentyfourteen"
        },
        {
            "binary_version": "4.4.2+dfsg-1ubuntu1",
            "binary_name": "wordpress-theme-twentysixteen"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress@4.9.5+dfsg1-1?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.8.2+dfsg-2
4.8.3+dfsg-1
4.9.1+dfsg-1
4.9.2+dfsg-1
4.9.4+dfsg-1
4.9.5+dfsg1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.9.5+dfsg1-1",
            "binary_name": "wordpress"
        },
        {
            "binary_version": "4.9.5+dfsg1-1",
            "binary_name": "wordpress-l10n"
        },
        {
            "binary_version": "4.9.5+dfsg1-1",
            "binary_name": "wordpress-theme-twentyfifteen"
        },
        {
            "binary_version": "4.9.5+dfsg1-1",
            "binary_name": "wordpress-theme-twentyseventeen"
        },
        {
            "binary_version": "4.9.5+dfsg1-1",
            "binary_name": "wordpress-theme-twentysixteen"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress@5.3.2+dfsg1-1ubuntu1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.2.2+dfsg1-1
5.2.4+dfsg1-1
5.3.2+dfsg1-1
5.3.2+dfsg1-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.3.2+dfsg1-1ubuntu1",
            "binary_name": "wordpress"
        },
        {
            "binary_version": "5.3.2+dfsg1-1ubuntu1",
            "binary_name": "wordpress-l10n"
        },
        {
            "binary_version": "5.3.2+dfsg1-1ubuntu1",
            "binary_name": "wordpress-theme-twentynineteen"
        },
        {
            "binary_version": "5.3.2+dfsg1-1ubuntu1",
            "binary_name": "wordpress-theme-twentyseventeen"
        },
        {
            "binary_version": "5.3.2+dfsg1-1ubuntu1",
            "binary_name": "wordpress-theme-twentysixteen"
        }
    ]
}