CVE-2024-53867
Synapse Matrix has a partial room state leak via Sliding Sync
4.3
MEDIUM
CVSS 3.1
EPSS 0.13%
Description
Synapse is an open-source Matrix homeserver. The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room. Non-state events, like messages, are unaffected. This vulnerability is fixed in 1.120.1.
How to fix CVE-2024-53867
To remediate CVE-2024-53867, upgrade the affected package to a fixed version below.
- —upgrade to 1.121.0-1 or later
- —upgrade to 1.120.1 or later
Is CVE-2024-53867 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.121.0-1
- >= 1.113.0rc1, < 1.120.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |