CVE-2025-54315
highpriority · track · 0EPSS 0.003 · 27 %ileEUUSgrimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.34% (27th) EPSS
CVSS 7.1 · high
Who says so?
2 sources
cnnvd · enisa_euvd
EPSS · scored 2026-10-27
The Matrix specification before 1.16 (i.e., with a room version before 12) lacks create event uniqueness.
01
cvss
Technical severity, 0–10. One row per scoring source.
7.1
010
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.1
v3.17.1highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:Lsecondary · cve@mitre.org USexploitability 1.8 · impact 4.7
02
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
03
weaknesses
The CWE weakness classes this flaw belongs to.
04
affected products (1)
Products and version ranges known to be affected.
05
also known as (3)
Other names and identifiers for this entity.
06
sources
Which sources assert this record, and when.
published 2025-10-02modified 2026-10-12
07
references (7)
External citations — patches, advisories, analysis.
- https://github.com/matrix-org/matrix-spec/releasesPatchcnnvd
- https://github.com/matrix-org/matrix-spec/releases/tag/v1.16cnnvd
- https://matrix.org/blog/2025/08/project-hydra-improving-state-res/cnnvd
- https://github.com/matrix-org/matrix-spec/releases/tag/v1.16enisa_euvd
- https://matrix.org/blog/2025/08/project-hydra-improving-state-res/enisa_euvd
- https://github.com/matrix-org/matrix-spec/releases/tag/v1.16nvd
- https://matrix.org/blog/2025/08/project-hydra-improving-state-res/nvd
scry
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan