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.
Published 2023-05-26 14:15:10
Updated 2023-06-11 04:15:47
Source GitHub, Inc.
View at NVD,   CVE.org
Vulnerability category: Information leak

Products affected by CVE-2022-39335

Exploit prediction scoring system (EPSS) score for CVE-2022-39335

0.11%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 45 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2022-39335

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
1.6
3.4
NIST
5.0
MEDIUM CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
1.6
3.4
GitHub, Inc.

CWE ids for CVE-2022-39335

References for CVE-2022-39335

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