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Vulnerability details: VCID-1r3j-umak-ebhe
Vulnerability ID VCID-1r3j-umak-ebhe
Aliases CVE-2022-39374
GHSA-p9qp-c452-f9r7
PYSEC-2023-66
Summary 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 current state of that room. This can be exploited in a way that causes all further messages and state changes sent in that room from the vulnerable homeserver to be rejected. This issue has been patched in version 1.68.0
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-400 Uncontrolled Resource Consumption
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
There are no known severity scores.
Reference id Reference type URL
https://github.com/matrix-org/synapse
https://github.com/matrix-org/synapse/commit/b73cbb82157d9666e8d667733afebc0d09ed858c
https://github.com/matrix-org/synapse/pull/13723
https://github.com/matrix-org/synapse/security/advisories/GHSA-p9qp-c452-f9r7
https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-66.yaml
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD
CVE-2022-39374 https://nvd.nist.gov/vuln/detail/CVE-2022-39374
GHSA-p9qp-c452-f9r7 https://github.com/advisories/GHSA-p9qp-c452-f9r7
No exploits are available.
There are no known vectors.

No EPSS data available for this vulnerability.

Date Actor Action Source VulnerableCode Version
2026-06-02T04:18:46.057921+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/matrix-synapse/PYSEC-2023-66.yaml 38.6.0