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CVE-2025-54421— NamelessMC allows Stored Cross Site Scripting (XSS) in SEO component

Quick assessment

Affected
NamelessMC Nameless
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NamelessMC是NamelessMC团队的一款免费、易于使用且功能强大的网站软件。适用于您的 Minecraft 服务器，其中包含大量功能。 NamelessMC 2.2.4之前版本存在安全漏洞，该漏洞源于跨站脚本漏洞，可能导致注入恶意Web脚本或HTML。

CVSS 7.2 · High EPSS 0.39% · P31
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I. Basic Information for CVE-2025-54421

Vulnerability Information
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Vulnerability Title
NamelessMC allows Stored Cross Site Scripting (XSS) in SEO component
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
NamelessMC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NamelessMC是NamelessMC团队的一款免费、易于使用且功能强大的网站软件。适用于您的 Minecraft 服务器，其中包含大量功能。 NamelessMC 2.2.4之前版本存在安全漏洞，该漏洞源于跨站脚本漏洞，可能导致注入恶意Web脚本或HTML。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
NamelessMC Nameless < 2.2.4 -

II. Public POCs for CVE-2025-54421

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9400 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2025-54421

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Vendor Advisories for CVE-2025-54421 (1)

Same Patch Batch · NamelessMC · 2025-08-18 · 3 CVEs total

CVE-2025-54117 9.1 CRITICAL NamelessMC allows Stored Cross-Site Scripting (XSS) in dashboard text editor
CVE-2025-54118 5.3 MEDIUM NamelessMC allows sensitive information disclosure in member list component

IV. Related Vulnerabilities

Same product: Nameless
Same vendor: NamelessMC
Same weakness: CWE-79

V. Comments for CVE-2025-54421

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