CVE-2021-21333
CVE-2021-21333 · HTML injection in email and account expiry notifications
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.1 · Medium · EPSS 1.4% · Fix available
- Published
- Updated
Affected products and versions
synapse
- Versions
- < 1.27.0: Affected
No fix published
matrix-synapse PyPI
- Versions
- 0.33.5
- 0.33.5.1
- 0.33.6
- 0.33.6rc1
- 0.33.7
- 0.33.7rc1
- 0.33.7rc2
- 0.33.8
- 0.33.8rc2
- 0.33.9
- 0.34.0
- 0.34.0.1
- 0.34.0rc1
- 0.34.0rc2
- 0.34.1.1
- 0.99.0
- 0.99.0rc1
- 0.99.0rc2
- 0.99.0rc3
- 0.99.0rc4
- 0.99.1
- 0.99.1.1
- 0.99.1rc1
- 0.99.1rc2
- 0.99.2
- 0.99.2rc1
- 0.99.3
- 0.99.3.1
- 0.99.3.2
- 0.99.3rc1
- 0.99.4
- 0.99.4rc1
- 0.99.5
- 0.99.5.1
- 0.99.5.2
- 0.99.5rc1
- 1.0.0
- 1.0.0rc1
- 1.0.0rc2
- 1.0.0rc3
- 1.1.0
- 1.1.0rc1
- 1.1.0rc2
- 1.10.0
- 1.10.0rc1
- 1.10.0rc2
- 1.10.0rc3
- 1.10.0rc5
- 1.10.1
- 1.11.0
- 1.11.0rc1
- 1.11.1
- 1.12.0
- 1.12.0rc1
- 1.12.1
- 1.12.1rc1
- 1.12.2
- 1.12.3
- 1.12.4
- 1.12.4rc1
- 1.13.0
- 1.13.0rc1
- 1.13.0rc2
- 1.13.0rc3
- 1.14.0
- 1.14.0rc1
- 1.14.0rc2
- 1.15.0
- 1.15.0rc1
- 1.15.1
- 1.15.2
- 1.16.0
- 1.16.0rc1
- 1.16.0rc2
- 1.16.1
- 1.17.0
- 1.17.0rc1
- 1.18.0
- 1.18.0rc1
- 1.18.0rc2
- 1.19.0
- 1.19.0rc1
- 1.19.1
- 1.19.1rc1
- 1.19.2
- 1.19.3
- 1.2.0
- 1.2.0rc1
- 1.2.0rc2
- 1.2.1
- 1.20.0
- 1.20.0rc1
- 1.20.0rc2
- 1.20.0rc3
- 1.20.0rc4
- 1.20.0rc5
- 1.20.1
- 1.21.0
- 1.21.0rc1
- 1.21.0rc2
- 1.21.0rc3
- 1.21.1
- 1.21.2
- 1.22.0
- 1.22.0rc1
- 1.22.0rc2
- 1.22.1
- 1.23.0
- 1.23.0rc1
- 1.23.1
- 1.24.0
- 1.24.0rc1
- 1.24.0rc2
- 1.25.0
- 1.25.0rc1
- 1.26.0
- 1.26.0rc1
- 1.26.0rc2
- 1.27.0rc1
- 1.27.0rc2
- 1.3.0
- 1.3.0rc1
- 1.3.1
- 1.4.0
- 1.4.0rc1
- 1.4.0rc2
- 1.4.1
- 1.4.1rc1
- 1.5.0
- 1.5.0rc1
- 1.5.0rc2
- 1.5.1
- 1.6.0
- 1.6.0rc1
- 1.6.0rc2
- 1.6.1
- 1.7.0
- 1.7.0rc1
- 1.7.0rc2
- 1.7.1
- 1.7.2
- 1.7.3
- 1.8.0
- 1.8.0rc1
- 1.9.0
- 1.9.0.dev1
- 1.9.0.dev2
- 1.9.0rc1
- 1.9.1
- Affected ranges
- ECOSYSTEM: < 1.27.0
Update to 1.27.0
matrix-synapse PyPI
- Versions
- 0.33.5
- 0.33.5.1
- 0.33.6
- 0.33.6rc1
- 0.33.7
- 0.33.7rc1
- 0.33.7rc2
- 0.33.8
- 0.33.8rc2
- 0.33.9
- 0.34.0
- 0.34.0.1
- 0.34.0rc1
- 0.34.0rc2
- 0.34.1.1
- 0.99.0
- 0.99.0rc1
- 0.99.0rc2
- 0.99.0rc3
- 0.99.0rc4
- 0.99.1
- 0.99.1.1
- 0.99.1rc1
- 0.99.1rc2
- 0.99.2
- 0.99.2rc1
- 0.99.3
- 0.99.3.1
- 0.99.3.2
- 0.99.3rc1
- 0.99.4
- 0.99.4rc1
- 0.99.5
- 0.99.5.1
- 0.99.5.2
- 0.99.5rc1
- 1.0.0
- 1.0.0rc1
- 1.0.0rc2
- 1.0.0rc3
- 1.1.0
- 1.1.0rc1
- 1.1.0rc2
- 1.10.0
- 1.10.0rc1
- 1.10.0rc2
- 1.10.0rc3
- 1.10.0rc5
- 1.10.1
- 1.11.0
- 1.11.0rc1
- 1.11.1
- 1.12.0
- 1.12.0rc1
- 1.12.1
- 1.12.1rc1
- 1.12.2
- 1.12.3
- 1.12.4
- 1.12.4rc1
- 1.13.0
- 1.13.0rc1
- 1.13.0rc2
- 1.13.0rc3
- 1.14.0
- 1.14.0rc1
- 1.14.0rc2
- 1.15.0
- 1.15.0rc1
- 1.15.1
- 1.15.2
- 1.16.0
- 1.16.0rc1
- 1.16.0rc2
- 1.16.1
- 1.17.0
- 1.17.0rc1
- 1.18.0
- 1.18.0rc1
- 1.18.0rc2
- 1.19.0
- 1.19.0rc1
- 1.19.1
- 1.19.1rc1
- 1.19.2
- 1.19.3
- 1.2.0
- 1.2.0rc1
- 1.2.0rc2
- 1.2.1
- 1.20.0
- 1.20.0rc1
- 1.20.0rc2
- 1.20.0rc3
- 1.20.0rc4
- 1.20.0rc5
- 1.20.1
- 1.21.0
- 1.21.0rc1
- 1.21.0rc2
- 1.21.0rc3
- 1.21.1
- 1.21.2
- 1.22.0
- 1.22.0rc1
- 1.22.0rc2
- 1.22.1
- 1.23.0
- 1.23.0rc1
- 1.23.1
- 1.24.0
- 1.24.0rc1
- 1.24.0rc2
- 1.25.0
- 1.25.0rc1
- 1.26.0
- 1.26.0rc1
- 1.26.0rc2
- 1.27.0rc1
- 1.27.0rc2
- 1.3.0
- 1.3.0rc1
- 1.3.1
- 1.4.0
- 1.4.0rc1
- 1.4.0rc2
- 1.4.1
- 1.4.1rc1
- 1.5.0
- 1.5.0rc1
- 1.5.0rc2
- 1.5.1
- 1.6.0
- 1.6.0rc1
- 1.6.0rc2
- 1.6.1
- 1.7.0
- 1.7.0rc1
- 1.7.0rc2
- 1.7.1
- 1.7.2
- 1.7.3
- 1.8.0
- 1.8.0rc1
- 1.9.0
- 1.9.0.dev1
- 1.9.0.dev2
- 1.9.0rc1
- 1.9.1
- Affected ranges
- GIT: < e54746bdf7d5c831eabe4dcea76a7626f1de73df
- ECOSYSTEM: < 1.27.0
Update to 1.27.0
matrix-synapse Ubuntu:Pro:18.04:LTS
- Versions
- 0.19.2+dfsg-6
- 0.24.0+dfsg-1
- 0.24.0+dfsg-1ubuntu0.1~esm1
- 0.24.0+dfsg-1ubuntu0.1~esm4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
matrix-synapse Ubuntu:Pro:20.04:LTS
- Versions
- 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
- 1.11.0-1ubuntu0.1~esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://github.com/matrix-org/synapse/releases/tag/v1.27.0
- https://github.com/matrix-org/synapse/pull/9200
- https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df
- https://github.com/matrix-org/synapse/security/advisories/GHSA-c5f8-35qr-q4fm
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/
- https://nvd.nist.gov/vuln/detail/CVE-2021-21333