What is CVE-2024-37303?

CVE-2024-37303 is a medium-severity vulnerability in Element-hq Synapse, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2024-12-03.

How severe is CVE-2024-37303?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Element-hq Synapse

CVE-2024-37303

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…

Vulnerability class: Broken Authentication

EPSS: 0.003 (57.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Element-hq Synapse — versions < 1.106

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr (x_refsource_CONFIRM)
https://github.com/matrix-org/matrix-spec-proposals/pull/3916 (x_refsource_MISC)

Frequently asked questions

What is CVE-2024-37303?: CVE-2024-37303 is a medium-severity vulnerability in Element-hq Synapse, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2024-12-03.
How severe is CVE-2024-37303?: Medium severity. CVSS v3 base score is 5.3 out of 10.