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Vulnerabilities

Vulnerability · CVE-2025-54461

ChatLuck contains an insufficient granularity of access control vulnerability in Invitation of Guest Users.

Published Oct 16, 2025 · catalog updated Oct 16, 2025 · NEOJAPAN Inc. ChatLuck

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-54461. EPSS is 0.33%. Act only if a listed version of NEOJAPAN Inc. ChatLuck is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.33%
Remediation
Vendor / distro source
Affected products
vendor NEOJAPAN Inc. ChatLuck V6.6 R2.0 and earlier

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor NEOJAPAN Inc. ChatLuck V6.6 R2.0 and earlierV6.6 R2.0 and earlier

How to fix CVE-2025-54461

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-54461. EPSS is 0.33%. Act only if a listed version of NEOJAPAN Inc. ChatLuck is installed.

Which versions are affected?

Compare what you have installed with NEOJAPAN Inc. ChatLuck V6.6 R2.0 and earlier V6.6 R2.0 and earlier. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.33%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 16, 2025 · EUVD

    Detected

    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.

  2. Oct 16, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-54461

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-54461

    30-day exploitation probability 0.33%

    first.org
  • EUVDVulnerability recordEUVD-2025-34738

    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.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 26, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026