CVE-2018-16515
HIGHMatrix Synapse < 0.33.3.1 - Improper Verification of Cryptographic Signature
Title source: llmDescription
Matrix Synapse before 0.33.3.1 allows remote attackers to spoof events and possibly have unspecified other impacts by leveraging improper transaction and event signature validation.
References (3)
Core 3
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/matrix-org/synapse/issues/3796#event-1833126269
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IRW7YR2H3ASUSYX4AO4KMY3FNVDNYW3P/
Vendor Advisory x_refsource_confirm
https://matrix.org/blog/2018/09/06/critical-security-update-synapse-0-33-3-1/
Scores
CVSS v3
8.8
EPSS
0.0152
EPSS Percentile
71.4%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-347
Status
published
Products (3)
debian/debian_linux
8.0
matrix/synapse
< 0.33.3.1
pypi/matrix-synapse
0.33.3 - 0.33.3.1PyPI
Published
Sep 18, 2018
Tracked Since
Feb 18, 2026