CVE-2024-53867

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CVSS 3.1

4.3 medium

EPSS

<1%p37

Published

Dec 3, 2024 (Dec 3, 2024)

Modified

Jun 17, 2026

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.

Weakness: CWE-497
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (0.4%)

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