VULNERABILITY INTELLIGENCE
CVE-2024-53867
CVSS score4.3 MEDIUM
EPSS probability0.44%
CISA KEVNot currently listed
Published2024-12-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
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 classification
- CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere