# CVE-2025-54315

## Summary

- **CVE ID:** CVE-2025-54315
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L)
- **CWE:** CWE-837
- **Published:** Oct 2, 2025
- **Last Modified:** Mar 12, 2026

## Description

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

## Affected Products

- Matrix — Matrix specification (0)

## References

- [CNA](https://github.com/matrix-org/matrix-spec/releases/tag/v1.16)
- [CNA](https://matrix.org/blog/2025/08/project-hydra-improving-state-res/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.33%
- **EPSS Percentile:** 25.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._