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matrix synapse vulnerabilities and exploits
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7.5
CVSSv3
CVE-2018-12423
In Synapse prior to 0.31.2, unauthorised users can hijack rooms when there is no m.room.power_levels event in force.
Matrix Synapse
9.8
CVSSv3
CVE-2019-18835
Matrix Synapse prior to 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.
Matrix Synapse
7.5
CVSSv3
CVE-2018-10657
Matrix Synapse prior to 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py, as exploited in the wild in April 2018.
Matrix Synapse
6.5
CVSSv3
CVE-2021-21274
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.25.0, a malicious homeserver could redirect requests to their .well-known file to a large fi...
Matrix Synapse
Fedoraproject Fedora 34
8.2
CVSSv3
CVE-2021-21332
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the password reset endpoint served via Synapse was vulnerable to cross-site scripting ...
Matrix Synapse
Fedoraproject Fedora 34
6.1
CVSSv3
CVE-2021-21333
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the notification emails sent for notifications for missed messages or for an expiring ...
Matrix Synapse
Fedoraproject Fedora 34
6.3
CVSSv3
CVE-2021-21392
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when tra...
Matrix Synapse
Fedoraproject Fedora 34
6.5
CVSSv3
CVE-2021-21393
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm...
Matrix Synapse
Fedoraproject Fedora 34
6.5
CVSSv3
CVE-2021-21394
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm...
Matrix Synapse
Fedoraproject Fedora 34
5.3
CVSSv3
CVE-2021-29471
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.33.2 "Push rules" can specify conditions under which they will match, including `e...
Matrix Synapse
Fedoraproject Fedora 34
CVSSv3
CVSSv2
CVSSv3
VMScore
Recommendations:
CVE-2020-4463
CVE-2024-3400
deserialization
CVE-2024-21788
CVE-2023-42433
CVE-2024-21841
CVE-2024-22095
local file inclusion
memory leak
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