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.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2021-03-26T20:00:19
Updated: 2024-08-03T18:09:15.578Z
Reserved: 2020-12-22T00:00:00
Link: CVE-2021-21333
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-03-26T20:15:11.953
Modified: 2024-11-21T05:48:02.577
Link: CVE-2021-21333
Redhat
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