What is CVE-2025-54117?

CVE-2025-54117 is a critical-severity vulnerability in Namelessmc Nameless, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 9.1/10. Published 2025-08-18.

How severe is CVE-2025-54117?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2025-54117 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Namelessmc Nameless

CVE-2025-54117

NamelessMC is a free, easy to use & powerful website software for Minecraft servers. Cross-site scripting (XSS) vulnerability in NamelessMC before 2.2.3 allows remote authenticated attackers to inject arbitrary web script or HTML via the d…

EPSS: 0.001 (17.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

Affected products

Namelessmc Nameless — versions < 2.2.4

Weakness classification (CWE)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

https://github.com/NamelessMC/Nameless/security/advisories/GHSA-gp3j-j84w-vqxx (x_refsource_CONFIRM)
https://github.com/NamelessMC/Nameless/commit/0e77706b2966dd9f2e30502126d6581ecc001f09 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-54117?: CVE-2025-54117 is a critical-severity vulnerability in Namelessmc Nameless, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 9.1/10. Published 2025-08-18.
How severe is CVE-2025-54117?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2025-54117 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.