Open Redirect Affecting matrix-synapse package, versions [,1.28.0)
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Test your applications- Snyk ID SNYK-PYTHON-MATRIXSYNAPSE-1245051
- published 13 Apr 2021
- disclosed 13 Apr 2021
- credit mscherer
Introduced: 13 Apr 2021
CVE-2021-21392 Open this link in a new tabHow to fix?
Upgrade matrix-synapse to version 1.28.0 or higher.
Overview
matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP.
Affected versions of this package are vulnerable to Open Redirect. Requests to user provided domains are not restricted to external IP addresses when transitional IPv6 addresses are used. Outbound requests to federation, identity servers, when calculating the key validity for third-party invite events, sending push notifications, and generating URL previews are affected. This can cause Synapse to make requests to internal infrastructure on dual-stack networks.