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CVE-2021-21333

Published: 2021-03-26T20:15Z
Last Modified: 2024-11-21T05:48Z
Source: MITRE CVE List
License: MITRE-CVE-TOS
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. > MITRE Terms of Use apply – see LICENSE‑MITRE.txt