CVE-2025-54421: nameless XSS — Exploit & Fix

Description

NamelessMC is a free, easy to use & powerful website software for Minecraft servers. Cross-site scripting (XSS) vulnerability in NamelessMC before 2.2.4 allows remote authenticated attackers to inject arbitrary web script or HTML via the default_keywords crafted parameter. This vulnerability is fixed in 2.2.4.

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CVSS v3.1 Score

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

CWE-80 CWE-80

Affected Products

Vendor	Product	Versions
namelessmc	nameless	< 2.2.4

References

Advisories & Patches

https://github.com/NamelessMC/Nameless/commit/56d35cff9ee944c061791ef478cabd2bed0223c4 https://github.com/NamelessMC/Nameless/security/advisories/GHSA-f5rm-w4mx-q7rx

Exploits

https://github.com/NamelessMC/Nameless/security/advisories/GHSA-f5rm-w4mx-q7rx

Frequently Asked Questions

What is CVE-2025-54421? +

NamelessMC is a free, easy to use & powerful website software for Minecraft servers. Cross-site scripting (XSS) vulnerability in NamelessMC before 2.2.4 allows remote authenticated attackers to inject arbitrary web script or HTML via the default_keywords crafted parameter. This vulnerability is fixed in 2.2.4. It has a CVSS v3.1 base score of 7.2 (HIGH).

How severe is CVE-2025-54421? +

CVE-2025-54421 has a CVSS v3.1 score of 7.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-54421? +

CVE-2025-54421 affects products from namelessmc, specifically: nameless. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-54421? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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