🛡️ CVE-2024-37303
🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-306 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector.

Details

Severity Medium
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE CWE-306
Public Exploit ✅ No
Source NVD
Published 2024-12-03
Updated 2026-06-15
Modified 2026-06-06

Affected Packages

Software From version Fixed in
matrix-synapse 1.106
synapse 1.106.0

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