Resource exhaustion in Matrix Synapse

CVE-2023-45129

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of serv…

EPSS: 0.012 (63.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2023-45129?
CVE-2023-45129 is a medium-severity vulnerability in Matrix Synapse, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.9/10. Published 2023-10-10.
How severe is CVE-2023-45129?
Medium severity. CVSS v3 base score is 4.9 out of 10.