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matrix synapse vulnerabilities and exploits
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7.5
CVSSv3
CVE-2020-26890
Matrix Synapse prior to 1.20.0 erroneously permits non-standard NaN, Infinity, and -Infinity JSON values in fields of m.room.member events, allowing remote malicious users to execute a denial of service attack against the federation and common Matrix clients. If such a malformed ...
Matrix Synapse
Fedoraproject Fedora 32
Fedoraproject Fedora 33
4.3
CVSSv3
CVE-2023-42453
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This co...
Matrix Synapse
Fedoraproject Fedora 37
Fedoraproject Fedora 38
7.5
CVSSv3
CVE-2021-41281
Synapse is a package for Matrix homeservers written in Python 3/Twisted. Prior to version 1.47.1, Synapse instances with the media repository enabled can be tricked into downloading a file from a remote server into an arbitrary directory. No authentication is required for the aff...
Matrix Synapse
Fedoraproject Fedora 34
Fedoraproject Fedora 35
8.8
CVSSv3
CVE-2022-36009
gomatrixserverlib is a Go library for matrix protocol federation. Dendrite is a Matrix homeserver written in Go, an alternative to Synapse. The power level parsing within gomatrixserverlib was failing to parse the `"events_default"` key of the `m.room.power_levels` even...
Matrix Dendrite
Matrix Gomatrixserverlib -
NA
CVE-2024-31208
Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances prior to 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption ...
CVSSv3
CVSSv2
CVSSv3
VMScore
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