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Description

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

PUBLISHED Reserved 2025-07-20 | Published 2025-10-02 | Updated 2025-10-02 | Assigner mitre




HIGH: 7.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L

Problem types

CWE-837 Improper Enforcement of a Single, Unique Action

Product status

Default status
unaffected

Any version before 1.16
affected

References

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

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

cve.org (CVE-2025-54315)

nvd.nist.gov (CVE-2025-54315)

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