UBUNTU-CVE-2025-43921

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Source

https://ubuntu.com/security/CVE-2025-43921

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-43921.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-43921

Upstream

CVE-2025-43921

Withdrawn

2026-03-03T05:33:15Z

Published

2025-04-20T01:15:00Z

Modified

2026-03-03T06:09:43Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to create lists via the /mailman/create endpoint. NOTE: multiple third parties report that they are unable to reproduce this, regardless of whether cPanel or WHM is used.

References

Affected packages

Ubuntu:Pro:16.04:LTS / mailman

Package

Name: mailman
Purl: pkg:deb/ubuntu/mailman@1:2.1.20-1ubuntu0.6+esm2?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1:2.*

1:2.1.20-1

1:2.1.20-1ubuntu0.1

1:2.1.20-1ubuntu0.3

1:2.1.20-1ubuntu0.4

1:2.1.20-1ubuntu0.5

1:2.1.20-1ubuntu0.6

1:2.1.20-1ubuntu0.6+esm1

1:2.1.20-1ubuntu0.6+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "mailman",
            "binary_version": "1:2.1.20-1ubuntu0.6+esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-43921.json"

Ubuntu:18.04:LTS / mailman

Package

Name: mailman
Purl: pkg:deb/ubuntu/mailman@1:2.1.26-1ubuntu0.6?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1:2.*

1:2.1.23-1

1:2.1.24-1

1:2.1.25-1

1:2.1.26-1

1:2.1.26-1ubuntu0.1

1:2.1.26-1ubuntu0.2

1:2.1.26-1ubuntu0.3

1:2.1.26-1ubuntu0.4

1:2.1.26-1ubuntu0.5

1:2.1.26-1ubuntu0.6

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "mailman",
            "binary_version": "1:2.1.26-1ubuntu0.6"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-43921.json"

Ubuntu:Pro:20.04:LTS / mailman

Package

Name: mailman
Purl: pkg:deb/ubuntu/mailman@1:2.1.29-1ubuntu3.1+esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1:2.*

1:2.1.29-1

1:2.1.29-1build1

1:2.1.29-1ubuntu3

1:2.1.29-1ubuntu3.1

1:2.1.29-1ubuntu3.1+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "mailman",
            "binary_version": "1:2.1.29-1ubuntu3.1+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-43921.json"