CVE-2023-43796CWE-200

Synapse vulnerable to leak of remote user device information

Medium · published October 31, 2023

CVSS v3.1
5.3
EPSS
1%
Percentile
59.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00897 · 59.2th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2023-10-31T16:52Z
EPSS history
Timeline
  • 31 OCT 16:52Z
    Synapse vulnerable to leak of remote user device information
    cvelistv5