CVE-2022-39335
published 2023-05-26CVE-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…
PriorityP429medium5CVSS 3.1
AVNACHPRLUINSUCLILAL
EPSS
0.64%
46.4th percentile
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 events are legitimate and permitted in their room. However, in versions of Synapse up to and including 1.68.0, a Synapse homeserver answering a query for authorization events does not sufficiently check that the requesting server should be able to access them. The issue was patched in Synapse 1.69.0. Homeserver administrators are advised to upgrade.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | matrix-synapse | < matrix-synapse 1.69.0-1 (forky) | matrix-synapse 1.69.0-1 (forky) |
| matrix-org | synapse | < 1.69.0 | 1.69.0 |
| matrix | synapse | < 1.69.0 | 1.69.0 |
CVSS provenance
nvdv3.15.0MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
osv5.0MEDIUM
vendor_debian5.0MEDIUM
vendor_ubuntu5.0MEDIUM
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OSV
matrix-synapse vulnerabilities
osv·2025-04-22·CVSS 5.0
CVE-2023-32683 [MEDIUM] matrix-synapse vulnerabilities
matrix-synapse vulnerabilities
It was discovered that Synapse network policies could be bypassed via
specially crafted URLs. An attacker could possibly use this issue to
bypass authentication mechanisms. (CVE-2023-32683)
It was discovered that Synapse exposed cached device information. An
attacker could possibly use this issue to gain access to sensitive
information. (CVE-2023-43796)
It was discovered that Synapse could be tricked into rejecting state
changes in rooms. An attacker could possibly use this issue to cause
Synapse to stop functioning properly, resulting in a denial of service.
This issue was only fixed in Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2022-39374)
It was discovered that Synapse stored user credentials in a server's
database temporarily. An attacker could possi
OSV
CVE-2022-39335: Synapse is an open-source Matrix homeserver written and maintained by the Matrix
osv·2023-05-26·CVSS 5.0
CVE-2022-39335 [MEDIUM] CVE-2022-39335: Synapse is an open-source Matrix homeserver written and maintained by the Matrix
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 events are legitimate and permitted in their room. However, in versions of Synapse up to and including 1.68.0, a Synapse homeserver answering a query for authorization events does not sufficiently check that the requesting server should be able to access them. The issue was patched in Synapse 1.69.0. Homeserver administrators are advised to upgrade.
GHSA
Synapse does not apply enough checks to servers requesting auth events of events in a room
ghsa·2023-05-24
CVE-2022-39335 [HIGH] CWE-200 Synapse does not apply enough checks to servers requesting auth events of events in a room
Synapse does not apply enough checks to servers requesting auth events of events in a room
### Impact
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 *authorisation events* of events in a room. This is necessary so that a homeserver receiving some events can validate that those events are legitimate and permitted in their room.
However, in versions of Synapse up to and including 1.68.0, a Synapse homeserver answering a query for authorisation events does not sufficiently check that the requesting server should be able to access them.
Authorisation events include power level events (the list of user IDs and their power levels at the time) and relevant membership events (incl
OSV
Synapse does not apply enough checks to servers requesting auth events of events in a room
osv·2023-05-24
CVE-2022-39335 [HIGH] Synapse does not apply enough checks to servers requesting auth events of events in a room
Synapse does not apply enough checks to servers requesting auth events of events in a room
### Impact
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 *authorisation events* of events in a room. This is necessary so that a homeserver receiving some events can validate that those events are legitimate and permitted in their room.
However, in versions of Synapse up to and including 1.68.0, a Synapse homeserver answering a query for authorisation events does not sufficiently check that the requesting server should be able to access them.
Authorisation events include power level events (the list of user IDs and their power levels at the time) and relevant membership events (incl
Ubuntu
Synapse vulnerabilities
vendor_ubuntu·2025-04-22·CVSS 5.0
CVE-2023-41335 [MEDIUM] Synapse vulnerabilities
Title: Synapse vulnerabilities
Summary: Several security issues were fixed in Synapse.
It was discovered that Synapse network policies could be bypassed via
specially crafted URLs. An attacker could possibly use this issue to
bypass authentication mechanisms. (CVE-2023-32683)
It was discovered that Synapse exposed cached device information. An
attacker could possibly use this issue to gain access to sensitive
information. (CVE-2023-43796)
It was discovered that Synapse could be tricked into rejecting state
changes in rooms. An attacker could possibly use this issue to cause
Synapse to stop functioning properly, resulting in a denial of service.
This issue was only fixed in Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2022-39374)
It was discovered that Synapse stored user credentials in
Debian
CVE-2022-39335: matrix-synapse - Synapse is an open-source Matrix homeserver written and maintained by the Matrix...
vendor_debian·2022·CVSS 5.0
CVE-2022-39335 [MEDIUM] CVE-2022-39335: matrix-synapse - Synapse is an open-source Matrix homeserver written and maintained by the Matrix...
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 events are legitimate and permitted in their room. However, in versions of Synapse up to and including 1.68.0, a Synapse homeserver answering a query for authorization events does not sufficiently check that the requesting server should be able to access them. The issue was patched in Synapse 1.69.0. Homeserver administrators are advised to upgrade.
Scope: local
forky: resolved (fixed in 1.69.0-1)
sid: resolved (fixed in 1.69.0-1)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/matrix-org/synapse/issues/13288https://github.com/matrix-org/synapse/pull/13823https://github.com/matrix-org/synapse/security/advisories/GHSA-45cj-f97f-ggwvhttps://lists.fedoraproject.org/archives/list/[email protected]/message/T2MBNMZAFY4RCZL2VGBGAPKGB4JUPZVS/https://github.com/matrix-org/synapse/issues/13288https://github.com/matrix-org/synapse/pull/13823https://github.com/matrix-org/synapse/security/advisories/GHSA-45cj-f97f-ggwvhttps://lists.fedoraproject.org/archives/list/[email protected]/message/T2MBNMZAFY4RCZL2VGBGAPKGB4JUPZVS/
2023-05-26
Published