CVE-2025-54315

Published: Oct 2, 2025Updated: Oct 6, 2025 Sources: CVE List NVDCWE-837

NVD MITRE

7.1CVSSHIGH

EPSS Score

Description

The Matrix specification before 1.16 (i.e., with a room version before 12) lacks create event uniqueness.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:NConfidentiality

None

I:HIntegrity

High

A:LAvailability

Low

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Weaknesses

CWE-837

Affected Products

Matrix specification Matrix

Mixed

Communications / messaging-chat

matrixoss-projectGBCommunicationsaka synapse, matrix irc bridge, javascript sdk

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/matrix-org/matrix-spec/releases/tag/v1.16

github.com

https://matrix.org/blog/2025/08/project-hydra-improving-state-res/

matrix.org

Timeline

Published

Oct 2, 2025

Last Updated

Oct 6, 2025

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