Unauthenticated Remote Media Caching Vulnerability in Synapse by Element
CVE-2024-37303
Currently unrated
What is CVE-2024-37303?
The Synapse Matrix homeserver is vulnerable to a design flaw that permits unauthenticated remote participants to trigger the download and caching of remote media into the local media repository. This vulnerability enables unauthorized adversaries to inject potentially harmful content into the media repository, which then becomes accessible without authentication. Synapse version 1.106 implements a partial mitigation by introducing new authenticated endpoints for media downloads, while unauthenticated endpoints are scheduled to be deprecated in future releases, thereby preventing exploitation.
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