Vulnerability Details CVE-2023-43796
Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 39.5%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2023-43796
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cpe:2.3:a:matrix:synapse:-
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cpe:2.3:a:matrix:synapse:0.0.1
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cpe:2.3:a:matrix:synapse:0.1.0
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cpe:2.3:a:matrix:synapse:0.1.1
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cpe:2.3:a:matrix:synapse:0.1.2
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cpe:2.3:a:matrix:synapse:0.10.0
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cpe:2.3:a:matrix:synapse:0.10.1
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cpe:2.3:a:matrix:synapse:0.11.0
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cpe:2.3:a:matrix:synapse:0.11.1
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cpe:2.3:a:matrix:synapse:0.12.0
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cpe:2.3:a:matrix:synapse:0.12.1
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cpe:2.3:a:matrix:synapse:0.13.0
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cpe:2.3:a:matrix:synapse:0.13.1
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cpe:2.3:a:matrix:synapse:0.13.2
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cpe:2.3:a:matrix:synapse:0.13.3
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cpe:2.3:a:matrix:synapse:0.14.0
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cpe:2.3:a:matrix:synapse:0.15.0
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cpe:2.3:a:matrix:synapse:0.16.0
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cpe:2.3:a:matrix:synapse:0.16.1
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cpe:2.3:a:matrix:synapse:0.17.0
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cpe:2.3:a:matrix:synapse:0.17.1
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cpe:2.3:a:matrix:synapse:0.17.2
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cpe:2.3:a:matrix:synapse:0.17.3
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cpe:2.3:a:matrix:synapse:0.18.0
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cpe:2.3:a:matrix:synapse:0.18.1
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cpe:2.3:a:matrix:synapse:0.18.2
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cpe:2.3:a:matrix:synapse:0.18.3
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cpe:2.3:a:matrix:synapse:0.18.4
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cpe:2.3:a:matrix:synapse:0.18.5
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cpe:2.3:a:matrix:synapse:0.18.6
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cpe:2.3:a:matrix:synapse:0.18.7
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cpe:2.3:a:matrix:synapse:0.19.0
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cpe:2.3:a:matrix:synapse:0.19.1
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cpe:2.3:a:matrix:synapse:0.19.2
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cpe:2.3:a:matrix:synapse:0.19.3
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cpe:2.3:a:matrix:synapse:0.2.0
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cpe:2.3:a:matrix:synapse:0.2.1
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cpe:2.3:a:matrix:synapse:0.2.2
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cpe:2.3:a:matrix:synapse:0.2.3
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cpe:2.3:a:matrix:synapse:0.20.0
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cpe:2.3:a:matrix:synapse:0.21.0
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cpe:2.3:a:matrix:synapse:0.21.1
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cpe:2.3:a:matrix:synapse:0.22.0
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cpe:2.3:a:matrix:synapse:0.22.1
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cpe:2.3:a:matrix:synapse:0.23.0
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cpe:2.3:a:matrix:synapse:0.23.1
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cpe:2.3:a:matrix:synapse:0.24.0
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cpe:2.3:a:matrix:synapse:0.24.1
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cpe:2.3:a:matrix:synapse:0.25.0
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cpe:2.3:a:matrix:synapse:0.25.1
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cpe:2.3:a:matrix:synapse:0.26.0
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cpe:2.3:a:matrix:synapse:0.26.1
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cpe:2.3:a:matrix:synapse:0.27.0
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cpe:2.3:a:matrix:synapse:0.27.1
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cpe:2.3:a:matrix:synapse:0.27.2
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cpe:2.3:a:matrix:synapse:0.27.3
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cpe:2.3:a:matrix:synapse:0.27.4
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cpe:2.3:a:matrix:synapse:0.28.0
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cpe:2.3:a:matrix:synapse:0.28.1
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cpe:2.3:a:matrix:synapse:0.29.0
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cpe:2.3:a:matrix:synapse:0.29.1
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cpe:2.3:a:matrix:synapse:0.3.0
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cpe:2.3:a:matrix:synapse:0.3.1
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cpe:2.3:a:matrix:synapse:0.3.2
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cpe:2.3:a:matrix:synapse:0.3.3
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cpe:2.3:a:matrix:synapse:0.3.4
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cpe:2.3:a:matrix:synapse:0.30.0
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cpe:2.3:a:matrix:synapse:0.31.0
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cpe:2.3:a:matrix:synapse:0.31.1
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cpe:2.3:a:matrix:synapse:0.31.2
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cpe:2.3:a:matrix:synapse:0.32.0
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cpe:2.3:a:matrix:synapse:0.32.1
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cpe:2.3:a:matrix:synapse:0.32.2
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cpe:2.3:a:matrix:synapse:0.33.0
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cpe:2.3:a:matrix:synapse:0.33.1
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cpe:2.3:a:matrix:synapse:0.33.2
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cpe:2.3:a:matrix:synapse:0.33.2.1
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cpe:2.3:a:matrix:synapse:0.33.3
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cpe:2.3:a:matrix:synapse:0.33.3.1
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cpe:2.3:a:matrix:synapse:0.33.4
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cpe:2.3:a:matrix:synapse:0.33.5
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cpe:2.3:a:matrix:synapse:0.33.5.1
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cpe:2.3:a:matrix:synapse:0.33.6
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cpe:2.3:a:matrix:synapse:0.33.7
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cpe:2.3:a:matrix:synapse:0.33.8
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cpe:2.3:a:matrix:synapse:0.33.9
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cpe:2.3:a:matrix:synapse:0.34.0
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cpe:2.3:a:matrix:synapse:0.34.0.1
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cpe:2.3:a:matrix:synapse:0.34.1
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cpe:2.3:a:matrix:synapse:0.34.1.1
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cpe:2.3:a:matrix:synapse:0.4.0
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cpe:2.3:a:matrix:synapse:0.4.1
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cpe:2.3:a:matrix:synapse:0.4.2
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cpe:2.3:a:matrix:synapse:0.5.0
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cpe:2.3:a:matrix:synapse:0.5.1
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cpe:2.3:a:matrix:synapse:0.5.2
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cpe:2.3:a:matrix:synapse:0.5.3
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cpe:2.3:a:matrix:synapse:0.5.4
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cpe:2.3:a:matrix:synapse:0.6.0
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cpe:2.3:a:matrix:synapse:0.6.1
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cpe:2.3:a:matrix:synapse:0.7.0
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cpe:2.3:a:matrix:synapse:0.7.1
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cpe:2.3:a:matrix:synapse:0.8.0
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cpe:2.3:a:matrix:synapse:0.8.1
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cpe:2.3:a:matrix:synapse:0.88.5.1
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cpe:2.3:a:matrix:synapse:0.9.0
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cpe:2.3:a:matrix:synapse:0.9.1
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cpe:2.3:a:matrix:synapse:0.9.2
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cpe:2.3:a:matrix:synapse:0.9.3
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cpe:2.3:a:matrix:synapse:0.9.4
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cpe:2.3:a:matrix:synapse:0.99.0
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cpe:2.3:a:matrix:synapse:0.99.1
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cpe:2.3:a:matrix:synapse:0.99.1.1
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cpe:2.3:a:matrix:synapse:0.99.2
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cpe:2.3:a:matrix:synapse:0.99.3
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cpe:2.3:a:matrix:synapse:0.99.3.1
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cpe:2.3:a:matrix:synapse:0.99.3.2
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cpe:2.3:a:matrix:synapse:0.99.4
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cpe:2.3:a:matrix:synapse:0.99.5
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cpe:2.3:a:matrix:synapse:0.99.5.2
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cpe:2.3:a:matrix:synapse:1.0.0
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cpe:2.3:a:matrix:synapse:1.1.0
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cpe:2.3:a:matrix:synapse:1.10.0
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cpe:2.3:a:matrix:synapse:1.10.1
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cpe:2.3:a:matrix:synapse:1.11.0
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cpe:2.3:a:matrix:synapse:1.11.1
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cpe:2.3:a:matrix:synapse:1.12.0
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cpe:2.3:a:matrix:synapse:1.12.1
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cpe:2.3:a:matrix:synapse:1.12.2
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cpe:2.3:a:matrix:synapse:1.12.3
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cpe:2.3:a:matrix:synapse:1.12.4
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cpe:2.3:a:matrix:synapse:1.13.0
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cpe:2.3:a:matrix:synapse:1.14.0
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cpe:2.3:a:matrix:synapse:1.15.0
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cpe:2.3:a:matrix:synapse:1.15.1
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cpe:2.3:a:matrix:synapse:1.15.2
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cpe:2.3:a:matrix:synapse:1.16.0
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cpe:2.3:a:matrix:synapse:1.16.1
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cpe:2.3:a:matrix:synapse:1.17.0
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cpe:2.3:a:matrix:synapse:1.18.0
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cpe:2.3:a:matrix:synapse:1.19.0
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cpe:2.3:a:matrix:synapse:1.19.1
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cpe:2.3:a:matrix:synapse:1.19.2
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cpe:2.3:a:matrix:synapse:1.19.3
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cpe:2.3:a:matrix:synapse:1.2.0
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cpe:2.3:a:matrix:synapse:1.2.1
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cpe:2.3:a:matrix:synapse:1.20.0
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cpe:2.3:a:matrix:synapse:1.21.0
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cpe:2.3:a:matrix:synapse:1.21.1
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cpe:2.3:a:matrix:synapse:1.21.2
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cpe:2.3:a:matrix:synapse:1.22.0
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cpe:2.3:a:matrix:synapse:1.22.1
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cpe:2.3:a:matrix:synapse:1.23.0
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cpe:2.3:a:matrix:synapse:1.23.1
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cpe:2.3:a:matrix:synapse:1.24.0
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cpe:2.3:a:matrix:synapse:1.25.0
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cpe:2.3:a:matrix:synapse:1.26.0
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cpe:2.3:a:matrix:synapse:1.27.0
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cpe:2.3:a:matrix:synapse:1.28.0
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cpe:2.3:a:matrix:synapse:1.29.0
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cpe:2.3:a:matrix:synapse:1.3.0
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cpe:2.3:a:matrix:synapse:1.3.1
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cpe:2.3:a:matrix:synapse:1.30.0
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cpe:2.3:a:matrix:synapse:1.30.1
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cpe:2.3:a:matrix:synapse:1.31.0
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cpe:2.3:a:matrix:synapse:1.32.0
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cpe:2.3:a:matrix:synapse:1.32.1
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cpe:2.3:a:matrix:synapse:1.32.2
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cpe:2.3:a:matrix:synapse:1.33.0
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cpe:2.3:a:matrix:synapse:1.33.1
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cpe:2.3:a:matrix:synapse:1.33.2
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cpe:2.3:a:matrix:synapse:1.34.0
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cpe:2.3:a:matrix:synapse:1.35.0
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cpe:2.3:a:matrix:synapse:1.35.1
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cpe:2.3:a:matrix:synapse:1.36.0
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cpe:2.3:a:matrix:synapse:1.37.0
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cpe:2.3:a:matrix:synapse:1.37.1
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cpe:2.3:a:matrix:synapse:1.38.0
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cpe:2.3:a:matrix:synapse:1.38.1
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cpe:2.3:a:matrix:synapse:1.39.0
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cpe:2.3:a:matrix:synapse:1.4.0
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cpe:2.3:a:matrix:synapse:1.4.1
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cpe:2.3:a:matrix:synapse:1.40.0
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cpe:2.3:a:matrix:synapse:1.41.0
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cpe:2.3:a:matrix:synapse:1.41.1
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cpe:2.3:a:matrix:synapse:1.42.0
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cpe:2.3:a:matrix:synapse:1.43.0
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cpe:2.3:a:matrix:synapse:1.44.0
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cpe:2.3:a:matrix:synapse:1.45.0
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cpe:2.3:a:matrix:synapse:1.45.1
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cpe:2.3:a:matrix:synapse:1.46.0
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cpe:2.3:a:matrix:synapse:1.47.0
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cpe:2.3:a:matrix:synapse:1.47.1
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cpe:2.3:a:matrix:synapse:1.48.0
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cpe:2.3:a:matrix:synapse:1.49.0
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cpe:2.3:a:matrix:synapse:1.49.1
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cpe:2.3:a:matrix:synapse:1.49.2
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cpe:2.3:a:matrix:synapse:1.5.0
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cpe:2.3:a:matrix:synapse:1.5.1
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cpe:2.3:a:matrix:synapse:1.50.0
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cpe:2.3:a:matrix:synapse:1.50.1
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cpe:2.3:a:matrix:synapse:1.50.2
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cpe:2.3:a:matrix:synapse:1.51.0
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cpe:2.3:a:matrix:synapse:1.52.0
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cpe:2.3:a:matrix:synapse:1.53.0
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cpe:2.3:a:matrix:synapse:1.54.0
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cpe:2.3:a:matrix:synapse:1.55.0
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cpe:2.3:a:matrix:synapse:1.55.1
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cpe:2.3:a:matrix:synapse:1.55.2
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cpe:2.3:a:matrix:synapse:1.56.0
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cpe:2.3:a:matrix:synapse:1.57.0
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cpe:2.3:a:matrix:synapse:1.57.1
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cpe:2.3:a:matrix:synapse:1.58.0
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cpe:2.3:a:matrix:synapse:1.58.1
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cpe:2.3:a:matrix:synapse:1.59.0
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cpe:2.3:a:matrix:synapse:1.59.1
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cpe:2.3:a:matrix:synapse:1.6.0
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cpe:2.3:a:matrix:synapse:1.6.1
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cpe:2.3:a:matrix:synapse:1.60.0
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cpe:2.3:a:matrix:synapse:1.61.0
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cpe:2.3:a:matrix:synapse:1.61.1
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cpe:2.3:a:matrix:synapse:1.62.0
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cpe:2.3:a:matrix:synapse:1.63.0
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cpe:2.3:a:matrix:synapse:1.63.1
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cpe:2.3:a:matrix:synapse:1.64.0
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cpe:2.3:a:matrix:synapse:1.65.0
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cpe:2.3:a:matrix:synapse:1.66.0
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cpe:2.3:a:matrix:synapse:1.67.0
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cpe:2.3:a:matrix:synapse:1.68.0
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cpe:2.3:a:matrix:synapse:1.69.0
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cpe:2.3:a:matrix:synapse:1.7.0
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cpe:2.3:a:matrix:synapse:1.7.1
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cpe:2.3:a:matrix:synapse:1.7.2
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cpe:2.3:a:matrix:synapse:1.7.3
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cpe:2.3:a:matrix:synapse:1.70.0
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cpe:2.3:a:matrix:synapse:1.70.1
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cpe:2.3:a:matrix:synapse:1.71.0
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cpe:2.3:a:matrix:synapse:1.72.0
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cpe:2.3:a:matrix:synapse:1.73.0
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cpe:2.3:a:matrix:synapse:1.74.0
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cpe:2.3:a:matrix:synapse:1.75.0
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cpe:2.3:a:matrix:synapse:1.76.0
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cpe:2.3:a:matrix:synapse:1.77.0
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cpe:2.3:a:matrix:synapse:1.78.0
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cpe:2.3:a:matrix:synapse:1.79.0
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cpe:2.3:a:matrix:synapse:1.8.0
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cpe:2.3:a:matrix:synapse:1.80.0
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cpe:2.3:a:matrix:synapse:1.81.0
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cpe:2.3:a:matrix:synapse:1.82.0
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cpe:2.3:a:matrix:synapse:1.83.0
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cpe:2.3:a:matrix:synapse:1.84.0
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cpe:2.3:a:matrix:synapse:1.84.1
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cpe:2.3:a:matrix:synapse:1.85.0
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cpe:2.3:a:matrix:synapse:1.85.1
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cpe:2.3:a:matrix:synapse:1.85.2
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cpe:2.3:a:matrix:synapse:1.86.0
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cpe:2.3:a:matrix:synapse:1.87.0
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cpe:2.3:a:matrix:synapse:1.88.0
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cpe:2.3:a:matrix:synapse:1.89.0
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cpe:2.3:a:matrix:synapse:1.9.0
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cpe:2.3:a:matrix:synapse:1.9.1
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cpe:2.3:a:matrix:synapse:1.90.0
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cpe:2.3:a:matrix:synapse:1.91.0
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cpe:2.3:a:matrix:synapse:1.91.1
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cpe:2.3:a:matrix:synapse:1.91.2
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cpe:2.3:a:matrix:synapse:1.92.0
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cpe:2.3:a:matrix:synapse:1.92.1
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cpe:2.3:a:matrix:synapse:1.92.2
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cpe:2.3:a:matrix:synapse:1.92.3
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cpe:2.3:a:matrix:synapse:1.93.0
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cpe:2.3:a:matrix:synapse:1.94.0
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cpe:2.3:a:matrix:synapse:1.95.0
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cpe:2.3:o:fedoraproject:fedora:38
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cpe:2.3:o:fedoraproject:fedora:39