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.
References
Link | Resource |
---|---|
https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df | Patch Third Party Advisory |
https://github.com/matrix-org/synapse/pull/9200 | Patch Third Party Advisory |
https://github.com/matrix-org/synapse/releases/tag/v1.27.0 | Third Party Advisory |
https://github.com/matrix-org/synapse/security/advisories/GHSA-c5f8-35qr-q4fm | Patch Third Party Advisory |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2021-03-26T20:00:19
Updated: 2021-08-02T02:06:36
Reserved: 2020-12-22T00:00:00
Link: CVE-2021-21333
JSON object: View
NVD Information
Status : Modified
Published: 2021-03-26T20:15:11.953
Modified: 2023-11-07T03:29:49.350
Link: CVE-2021-21333
JSON object: View
Redhat Information
No data.