CVE-2024-53867

Synapse Matrix has a partial room state leak via Sliding Sync

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.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: element-hq synapse
Published at:
Updated at:

References

Link Tags
https://github.com/element-hq/synapse/security/advisories/GHSA-56w4-5538-8v8h
https://github.com/matrix-org/matrix-spec-proposals/pull/4186

Frequently Asked Questions

What is the severity of CVE-2024-53867?
CVE-2024-53867 has been scored as a medium severity vulnerability.
How to fix CVE-2024-53867?
To fix CVE-2024-53867, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-53867 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-53867 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-53867?
CVE-2024-53867 affects element-hq synapse.
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