Is CVE-2024-53867 in the CISA KEV catalog?

No. CVE-2024-53867 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-53867?

CVE-2024-53867 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2024-53867?

CVE-2024-53867 has an EPSS score of 0.43% (34th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-53867?

Upgrade matrix-synapse on debian unstable to 1.121.0-1 or later.

CVE & CISA-KEV Catalog

CVE-2024-53867

MEDIUM

4.3

CVSS v3

NVD

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.

CWE-497

How to fix

Remediation Available

matrix-synapseDebian

Fixed in:1.121.0-1CVE-2024-53867

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.43%probability of exploitation in 30 days

34thpercentile

Low risk: more likely to be exploited than 34% of all known CVEs.

References

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-12-03.