UBUNTU-CVE-2026-3906

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Source
https://ubuntu.com/security/CVE-2026-3906
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3906.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-3906
Upstream
  • CVE-2026-3906
Published
2026-03-11T10:16:00Z
Modified
2026-05-20T16:25:38.489121793Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1. The Notes feature (block-level collaboration annotations) was introduced in WordPress 6.9 to allow editorial comments directly on posts in the block editor. However, the REST API create_item_permissions_check() method in the comments controller did not verify that the authenticated user has edit_post permission on the target post when creating a note. This makes it possible for authenticated attackers with Subscriber-level access to create notes on any post, including posts authored by other users, private posts, and posts in any status.

References

Affected packages

Ubuntu:16.04:LTS
wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress?arch=source&distro=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_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",
            "binary_version": "4.4.2+dfsg-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3906.json"
Ubuntu:18.04:LTS
wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress?arch=source&distro=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_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",
            "binary_version": "4.9.5+dfsg1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3906.json"
Ubuntu:20.04:LTS
wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress?arch=source&distro=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_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",
            "binary_version": "5.3.2+dfsg1-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3906.json"
Ubuntu:22.04:LTS
wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress?arch=source&distro=jammy

Affected ranges

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

Affected versions

5.*
5.7.1+dfsg1-2ubuntu1
5.8.1+dfsg1-2ubuntu1
5.8.2+dfsg1-1ubuntu1
5.8.3+dfsg1-1ubuntu1
5.8.3+dfsg1-1ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "wordpress",
            "binary_version": "5.8.3+dfsg1-1ubuntu1.1"
        },
        {
            "binary_name": "wordpress-l10n",
            "binary_version": "5.8.3+dfsg1-1ubuntu1.1"
        },
        {
            "binary_name": "wordpress-theme-twentynineteen",
            "binary_version": "5.8.3+dfsg1-1ubuntu1.1"
        },
        {
            "binary_name": "wordpress-theme-twentytwenty",
            "binary_version": "5.8.3+dfsg1-1ubuntu1.1"
        },
        {
            "binary_name": "wordpress-theme-twentytwentyone",
            "binary_version": "5.8.3+dfsg1-1ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3906.json"
Ubuntu:24.04:LTS
wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress?arch=source&distro=noble

Affected ranges

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

Affected versions

6.*
6.2+dfsg1-1ubuntu1
6.4.3+dfsg1-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "wordpress",
            "binary_version": "6.4.3+dfsg1-1ubuntu1"
        },
        {
            "binary_name": "wordpress-l10n",
            "binary_version": "6.4.3+dfsg1-1ubuntu1"
        },
        {
            "binary_name": "wordpress-theme-twentytwentyfour",
            "binary_version": "6.4.3+dfsg1-1ubuntu1"
        },
        {
            "binary_name": "wordpress-theme-twentytwentythree",
            "binary_version": "6.4.3+dfsg1-1ubuntu1"
        },
        {
            "binary_name": "wordpress-theme-twentytwentytwo",
            "binary_version": "6.4.3+dfsg1-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3906.json"
Ubuntu:25.10
wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress?arch=source&distro=questing

Affected ranges

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

Affected versions

6.*
6.7.2+dfsg1-1.1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "wordpress",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu1"
        },
        {
            "binary_name": "wordpress-l10n",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu1"
        },
        {
            "binary_name": "wordpress-theme-twentytwentyfive",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu1"
        },
        {
            "binary_name": "wordpress-theme-twentytwentyfour",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu1"
        },
        {
            "binary_name": "wordpress-theme-twentytwentythree",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3906.json"
Ubuntu:26.04:LTS
wordpress

Package

Name
wordpress
Purl
pkg:deb/ubuntu/wordpress?arch=source&distro=resolute

Affected ranges

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

Affected versions

6.*
6.7.2+dfsg1-1.1ubuntu1
6.7.2+dfsg1-1.1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "wordpress",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu2"
        },
        {
            "binary_name": "wordpress-l10n",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu2"
        },
        {
            "binary_name": "wordpress-theme-twentytwentyfive",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu2"
        },
        {
            "binary_name": "wordpress-theme-twentytwentyfour",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu2"
        },
        {
            "binary_name": "wordpress-theme-twentytwentythree",
            "binary_version": "6.7.2+dfsg1-1.1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3906.json"