CVE-2024-53867

MEDIUM

matrix-synapse 1.113.0rc1-1.120.0 - Exposure of Sensitive Room State Information via Sliding Sync

Title source: llm

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.

References (2)

Core 2

Core References

Vendor Advisory x_refsource_confirm

https://github.com/element-hq/synapse/security/advisories/GHSA-56w4-5538-8v8h

Issue Tracking x_refsource_misc

https://github.com/matrix-org/matrix-spec-proposals/pull/4186

Scores

CVSS v3 4.3

EPSS 0.0042

EPSS Percentile 33.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-497

Status published

Products (2)

element-hq/synapse >= 1.113.0rc1, < 1.120.1

pypi/matrix-synapse 1.113.0rc1 - 1.120.1PyPI

Published Dec 03, 2024

Tracked Since Feb 18, 2026