What is CVE-2025-54461?

CVE-2025-54461 is a medium-severity vulnerability in Neojapan Inc. Chatluck, classified under CWE-1220. CVSS score: 5.3/10. Published 2025-10-16.

How severe is CVE-2025-54461?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Neojapan Inc. Chatluck

CVE-2025-54461

ChatLuck contains an insufficient granularity of access control vulnerability in Invitation of Guest Users. If exploited, an uninvited guest user may register itself as a guest user.

Published 2025-10-16 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.7th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Neojapan Inc. Chatluck — versions V6.6 R2.0 and earlier

Weakness classification (CWE)

CWE-1220

References

Frequently asked questions

What is CVE-2025-54461?: CVE-2025-54461 is a medium-severity vulnerability in Neojapan Inc. Chatluck, classified under CWE-1220. CVSS score: 5.3/10. Published 2025-10-16.
How severe is CVE-2025-54461?: Medium severity. CVSS v3 base score is 5.3 out of 10.