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Status published
Medium
CVE-2024-53867
Synapse Matrix has a partial room state leak via Sliding Sync
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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Affected Vendor
element-hq
View all reports →Affected Software
synapse
Vulnerable Versions:
>= 1.113.0rc1, < 1.120.1
Timeline
Official Publish:
December 3rd, 2024
Last Modified:
December 3rd, 2024
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N