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matrix synapse vulnerabilities and exploits
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5
CVSSv2
CVE-2019-11842
An issue exists in Matrix Sydent prior to 1.0.3 and Synapse prior to 0.99.3.1. Random number generation is mishandled, which makes it easier for malicious users to predict a Sydent authentication token or a Synapse random ID.
Matrix Sydent
Matrix Synapse
NA
CVE-2022-31152
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event...
Matrix Synapse
4.3
CVSSv2
CVE-2020-26891
AuthRestServlet in Matrix Synapse prior to 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote malicious user to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to t...
Matrix Synapse
NA
CVE-2022-39335
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix Federation API allows remote homeservers to request the authorization events in a room. This is necessary so that a homeserver receiving some events can validate that those...
Matrix Synapse
NA
CVE-2022-39374
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously rejected events into its view of the curre...
Matrix Synapse
NA
CVE-2023-32682
Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions it may be possible for a deactivated user to login when using uncommon configurations. This only applies if any of the following are true: 1. JSON Web Tokens are enabled for...
Matrix Synapse
NA
CVE-2023-32683
Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addres...
Matrix Synapse
5
CVSSv2
CVE-2018-12291
The on_get_missing_events function in handlers/federation.py in Matrix Synapse prior to 0.31.1 has a security bug in the get_missing_events federation API where event visibility rules were not applied correctly.
Matrix Synapse
5
CVSSv2
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
7.5
CVSSv2
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
CVSSv2
CVSSv2
CVSSv3
VMScore
Recommendations:
CVE-2024-28995
CVE-2024-36680
CVE-2024-35537
unauthorized
CVE-2024-21518
CVE-2024-37673
cross-site scripting
SSRF
CVE-2024-6241
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