UBUNTU-CVE-2021-21333

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2021-21333
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-21333.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-21333
Related
Published
2021-03-26T20:15:00Z
Modified
2025-04-23T15:07:39Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the notification emails sent for notifications for missed messages or for an expiring account are subject to HTML injection. In the case of the notification for missed messages, this could allow an attacker to insert forged content into the email. The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker. This is fixed in version 1.27.0.

References

Affected packages

Ubuntu:Pro:18.04:LTS / matrix-synapse

Package

Name
matrix-synapse
Purl
pkg:deb/ubuntu/matrix-synapse@0.24.0+dfsg-1ubuntu0.1~esm4?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

0.*

0.19.2+dfsg-6
0.24.0+dfsg-1
0.24.0+dfsg-1ubuntu0.1~esm1
0.24.0+dfsg-1ubuntu0.1~esm4

Ecosystem specific 

{
    "ubuntu_priority": "low"
}

Ubuntu:20.04:LTS / matrix-synapse

Package

Name
matrix-synapse
Purl
pkg:deb/ubuntu/matrix-synapse@1.11.0-1?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*

1.3.0-1
1.4.0-1
1.5.0-1
1.5.1-1
1.6.0-1
1.6.1-1
1.7.0-2
1.7.1-1
1.7.2-1
1.7.3-1
1.8.0-1
1.9.0-1
1.9.1-1
1.10.0-1
1.10.0-2
1.11.0-1

Ecosystem specific 

{
    "ubuntu_priority": "low"
}