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CVE-2022-39335

5.0 · MEDIUM

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation.

Published May 26, 2023CWE-200EPSS 0.64%

Overview

CVE-2022-39335 is a medium-severity vulnerability. It was published on May 26, 2023 and has a CVSS 3.1 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/matrix-org/synapse/issues/13288GitHubgithub.com/matrix-org/synapse/pull/13823GitHubgithub.com/matrix-org/synapse/security/advisories/GHSA-45cj-f97f-ggwvReflists.fedoraproject.org/archives/list/[email protected]/message/T2MBNMZAFY4RCZL2VGBGAPKGB4JUPZVS/GitHubgithub.com/matrix-org/synapse/issues/13288GitHubgithub.com/matrix-org/synapse/pull/13823GitHubgithub.com/matrix-org/synapse/security/advisories/GHSA-45cj-f97f-ggwvReflists.fedoraproject.org/archives/list/[email protected]/message/T2MBNMZAFY4RCZL2VGBGAPKGB4JUPZVS/

How CyberStrike helps

Frequently asked questions

What is CVE-2022-39335?

CVE-2022-39335 is a medium-severity vulnerability. It was published on May 26, 2023 and has a CVSS 3.1 base score of 5.0 (MEDIUM).

How severe is CVE-2022-39335?

This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-39335?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-39335?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-39335 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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