CVE-2022-31152
MEDIUMDescription
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 which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting `federation_domain_whitelist` to an empty list (`[]`) as a workaround.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 58% of all known CVEs.
References
Related Vulnerabilities
Other CWE-703 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-21894 | Critical | 9.8 | 19% | - | - |
| CVE-2025-59538 | High | 7.5 | 8.3% | - | Fix |
| CVE-2019-5031 | High | 8.8 | 6.0% | - | - |
| CVE-2023-49786 | High | 7.5 | 5.3% | - | Fix |
| CVE-2024-10781 | High | 8.1 | 3.8% | - | Fix |
| CVE-2024-22052 | High | 7.5 | 3.8% | - | - |
Common questions
How do I fix CVE-2022-31152?
Upgrade matrix-synapse on debian unstable to 1.63.0-1 or later.
Is CVE-2022-31152 being actively exploited?
Not that we know of. CVE-2022-31152 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.96% is the estimated probability that it will be exploited in the next 30 days. That is higher than 58% of all scored CVEs.
How severe is CVE-2022-31152?
CVE-2022-31152 has a CVSS v3 base score of 6.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2022-31152 affect?
Published advisories record a fix for matrix-synapse (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2022-31152
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.