GHSA-c5f8-35qr-q4fm

Source

https://github.com/advisories/GHSA-c5f8-35qr-q4fm

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/03/GHSA-c5f8-35qr-q4fm/GHSA-c5f8-35qr-q4fm.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-c5f8-35qr-q4fm

Aliases

Related

CVE-2021-21333

Published

2021-03-26T19:53:04Z

Modified

2024-09-30T21:34:01.292406Z

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
4.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N CVSS Calculator

Summary

HTML injection in email and account expiry notifications

Details

Impact

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.

Patches

This issue is fixed in #9200.

Workarounds

For the missed messages notifications:

The notif.html, notif_mail.html, and room.html templates can be overridden with custom templates that manually escapes the variables using JInja2's escape filter. See the email.template_dir setting.

For the account expiry notifications:

Account expiry can be disabled via the account_validity.enabled setting.
The notice_expiry.html template can be overridden with a custom template that manually escapes the variables using JInja2's escape filter. See the email.template_dir setting.

Database specific

{
    "nvd_published_at": "2021-03-26T20:15:00Z",
    "cwe_ids": [
        "CWE-74",
        "CWE-79"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2021-03-26T19:52:46Z"
}

References

Affected packages

PyPI / matrix-synapse

Package

Name: matrix-synapse; View open source insights on deps.dev
Purl: pkg:pypi/matrix-synapse

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.27.0

Affected versions

0.*

0.33.5

0.33.5.1

0.33.6rc1

0.33.6

0.33.7rc1

0.33.7rc2

0.33.7

0.33.8rc2

0.33.8

0.33.9

0.34.0rc1

0.34.0rc2

0.34.0

0.34.0.1

0.34.1.1

0.99.0rc1

0.99.0rc2

0.99.0rc3

0.99.0rc4

0.99.0

0.99.1rc1

0.99.1rc2

0.99.1

0.99.1.1

0.99.2rc1

0.99.2

0.99.3rc1

0.99.3

0.99.3.1

0.99.3.2

0.99.4rc1

0.99.4

0.99.5rc1

0.99.5

0.99.5.1

0.99.5.2

1.*

1.0.0rc1

1.0.0rc2

1.0.0rc3

1.0.0

1.1.0rc1

1.1.0rc2

1.1.0

1.2.0rc1

1.2.0rc2

1.2.0

1.2.1

1.3.0rc1

1.3.0

1.3.1

1.4.0rc1

1.4.0rc2

1.4.0

1.4.1rc1

1.4.1

1.5.0rc1

1.5.0rc2

1.5.0

1.5.1

1.6.0rc1

1.6.0rc2

1.6.0

1.6.1

1.7.0rc1

1.7.0rc2

1.7.0

1.7.1

1.7.2

1.7.3

1.8.0rc1

1.8.0

1.9.0.dev1

1.9.0.dev2

1.9.0rc1

1.9.0

1.9.1

1.10.0rc1

1.10.0rc2

1.10.0rc3

1.10.0rc5

1.10.0

1.10.1

1.11.0rc1

1.11.0

1.11.1

1.12.0rc1

1.12.0

1.12.1rc1

1.12.1

1.12.2

1.12.3

1.12.4rc1

1.12.4

1.13.0rc1

1.13.0rc2

1.13.0rc3

1.13.0

1.14.0rc1

1.14.0rc2

1.14.0

1.15.0rc1

1.15.0

1.15.1

1.15.2

1.16.0rc1

1.16.0rc2

1.16.0

1.16.1

1.17.0rc1

1.17.0

1.18.0rc1

1.18.0rc2

1.18.0

1.19.0rc1

1.19.0

1.19.1rc1

1.19.1

1.19.2

1.19.3

1.20.0rc1

1.20.0rc2

1.20.0rc3

1.20.0rc4

1.20.0rc5

1.20.0

1.20.1

1.21.0rc1

1.21.0rc2

1.21.0rc3

1.21.0

1.21.1

1.21.2

1.22.0rc1

1.22.0rc2

1.22.0

1.22.1

1.23.0rc1

1.23.0

1.23.1

1.24.0rc1

1.24.0rc2

1.24.0

1.25.0rc1

1.25.0

1.26.0rc1

1.26.0rc2

1.26.0

1.27.0rc1

1.27.0rc2