https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Sat, 24 Oct 2026 23:24:57 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-22131 EUVD-2026-22131 https://cve.radiocsirt.org/vuln/euvd-2026-22131 https://cve.radiocsirt.org/vuln/fkie_cve-2021-21333 <p>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.</p> <p>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.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2021-21333 https://cve.radiocsirt.org/vuln/ghsa-c5f8-35qr-q4fm <p><strong>Affected:</strong> PyPI: matrix-synapse</p> <p>### 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.</p> <p>The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker.</p> <p>### Patches This issue is fixed in #9200.</p> <p>### Workarounds For the missed messages notifications:</p> <p>The `notif.html`, `notif_mail.html`, and `room.html` templates can be overridden with custom templates that manually escapes the variables using [JInja2&#39;s `escape` filter](https://jinja.palletsprojects.com/en/2.11.x/templates/#escape). See the `email.template_dir` setting.</p> <p>For the account expiry notifications:</p> <p>1. Account expiry can be disabled via the `account_validity.enabled` setting.</p> <p>2. The `notice_expiry.html` template can be overridden with a custom template that manually escapes the variables using [JInja2&#39;s `escape` filter](https://jinja.palletsprojects.com/en/2.11.x/templates/#escape). See the `email.template_dir` setting.</p> <p><strong>Affected:</strong> PyPI: matrix-synapse</p> <p>### 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.</p> <p>The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker.</p> <p>### Patches This issue is fixed in #9200.</p> <p>### Workarounds For the missed messages notifications:</p> <p>The `notif.html`, `notif_mail.html`, and `room.html` templates can be overridden with custom templates that manually escapes the variables using [JInja2&#39;s `escape` filter](https://jinja.palletsprojects.com/en/2.11.x/templates/#escape). See the `email.template_dir` setting.</p> <p>For the account expiry notifications:</p> <p>1. Account expiry can be disabled via the `account_validity.enabled` setting.</p> <p>2. The `notice_expiry.html` template can be overridden with a custom template that manually escapes the variables using [JInja2&#39;s `escape` filter](https://jinja.palletsprojects.com/en/2.11.x/templates/#escape). See the `email.template_dir` setting.</p> https://cve.radiocsirt.org/vuln/ghsa-c5f8-35qr-q4fm https://cve.radiocsirt.org/vuln/gsd-2021-21333 gsd-2021-21333 https://cve.radiocsirt.org/vuln/gsd-2021-21333 https://cve.radiocsirt.org/vuln/pysec-2021-134 <p><strong>Affected:</strong> PyPI: matrix-synapse</p> <p>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.</p> <p><strong>Affected:</strong> PyPI: matrix-synapse</p> <p>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.</p> https://cve.radiocsirt.org/vuln/pysec-2021-134 https://cve.radiocsirt.org/vuln/ubuntu-cve-2021-21333 <p><strong>Affected:</strong> Ubuntu:Pro:18.04:LTS: matrix-synapse, Ubuntu:Pro:20.04:LTS: matrix-synapse</p> <p>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.</p> <p><strong>Affected:</strong> Ubuntu:Pro:18.04:LTS: matrix-synapse, Ubuntu:Pro:20.04:LTS: matrix-synapse</p> <p>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.</p> https://cve.radiocsirt.org/vuln/ubuntu-cve-2021-21333