USN-8323-1

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Source
https://ubuntu.com/security/notices/USN-8323-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8323-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8323-1
Upstream
Related
Published
2026-05-27T13:28:20Z
Modified
2026-05-27T18:14:18.626211543Z
Summary
postorius vulnerability
Details

It was discovered that Postorius did not properly escape HTML in message subjects when rendering the Held messages pop-up. An attacker could possibly use this issue to inject arbitrary HTML, resulting in exposure of sensitive information.

References

Affected packages

Ubuntu:25.10
postorius

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.3.13-1ubuntu1.1~25.10.1

Affected versions

1.*
1.3.13-1
1.3.13-1ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-django-postorius",
            "binary_version": "1.3.13-1ubuntu1.1~25.10.1"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "id": "CVE-2026-44742",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8323-1.json"
Ubuntu:26.04:LTS
postorius

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.3.13-1ubuntu1.1~26.04.1

Affected versions

1.*
1.3.13-1ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-django-postorius",
            "binary_version": "1.3.13-1ubuntu1.1~26.04.1"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:26.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-44742",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8323-1.json"
Ubuntu:Pro:18.04:LTS
postorius

Package

Name
postorius
Purl
pkg:deb/ubuntu/postorius?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.1.2-3ubuntu0.1+esm1

Affected versions

1.*
1.1.0-1
1.1.1-1
1.1.2-1
1.1.2-2
1.1.2-3
1.1.2-3ubuntu0.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "python-django-postorius",
            "binary_version": "1.1.2-3ubuntu0.1+esm1"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-44742",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8323-1.json"
Ubuntu:Pro:20.04:LTS
postorius

Package

Name
postorius
Purl
pkg:deb/ubuntu/postorius?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.4-1ubuntu0.1+esm1

Affected versions

1.*
1.2.4-1
1.2.4-1ubuntu0.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "python3-django-postorius",
            "binary_version": "1.2.4-1ubuntu0.1+esm1"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-44742",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8323-1.json"
Ubuntu:Pro:22.04:LTS
postorius

Package

Name
postorius
Purl
pkg:deb/ubuntu/postorius?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.3.5-1ubuntu0.1~esm1

Affected versions

1.*
1.3.4-2
1.3.5-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "python3-django-postorius",
            "binary_version": "1.3.5-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:22.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-44742",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8323-1.json"
Ubuntu:Pro:24.04:LTS
postorius

Package

Name
postorius
Purl
pkg:deb/ubuntu/postorius?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.3.10-1ubuntu0.1~esm1

Affected versions

1.*
1.3.8-3
1.3.10-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "python3-django-postorius",
            "binary_version": "1.3.10-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-44742",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8323-1.json"