Description
Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.
References (2)
Core 2
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/matrix-org/synapse/pull/6262
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/matrix-org/synapse/releases/tag/v1.5.0
Scores
CVSS v3
9.8
EPSS
0.0086
EPSS Percentile
53.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-345
Status
published
Products (2)
matrix/synapse
< 1.5.0
pypi/matrix-synapse
0 - 1.5.0PyPI
Published
Nov 08, 2019
Tracked Since
Feb 18, 2026