CVE-2025-54461

MEDIUM

ChatLuck < V6.6 R2.0 - Unauthenticated Guest User Registration via Invitation Bypass

Title source: llm

Description

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.

References (2)

Core 2

Core References

Various Sources

https://www.chatluck.com/support/package/mainte/pchatluck-%e8%a3%bd%e5%93%81%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%80%81%e8%a4%87%e6%95%b0%e3%81%ae%e3%82%bb%e3%82%ad%e3%83%a5%e3%83%aa%e3%83%86%e3%82%a3%e4%b8%8a%e3%81%ae%e5%95%8f%e9%a1%8c%e3%81%ab/

Third Party Advisory

https://jvn.jp/en/jp/JVN13030751/

Scores

CVSS v3 5.3

EPSS 0.0030

EPSS Percentile 21.0%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-1220

Status published

Products (1)

NEOJAPAN Inc./ChatLuck V6.6 R2.0 and earlier

Published Oct 16, 2025

Tracked Since Feb 18, 2026