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

> Authenticated attackers can inject arbitrary scripts via the default_keywords parameter in NamelessMC, potentially compromising user sessions.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Aug 2025
- **Updated:** 18 Aug 2025
- **Also known as:** GHSA-f5rm-w4mx-q7rx

## What is CVE-2025-54421?

CVE-2025-54421 is a high-severity cross-site scripting vulnerability in NamelessMC Nameless, published on 18 Aug 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official 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.

Weakness: CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2025-54421?

It affects 1 product.


Products: Namelessmc Nameless.

## How do I fix CVE-2025-54421?

No fix has been published for CVE-2025-54421 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-54421 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-54421 exists.

## Other vulnerabilities in NamelessMC Nameless

- [CVE-2022-2821](https://insights.sbomify.com/CVE-2022-2821/): Missing Critical Step in Authentication in namelessmc/nameless (critical 9.8)
- [CVE-2025-54117](https://insights.sbomify.com/CVE-2025-54117/): NamelessMC allows Stored Cross-Site Scripting (XSS) in dashboard text editor (critical 9.1)
- [CVE-2025-22144](https://insights.sbomify.com/CVE-2025-22144/): Account Takeover in NamelessMC (critical 9.0)
- [CVE-2025-32389](https://insights.sbomify.com/CVE-2025-32389/): NamelessMC Vulnerable to SQL Injections in /user/messaging and /panel/users/reports Pages (high 8.6)
- [CVE-2025-29784](https://insights.sbomify.com/CVE-2025-29784/): NamelessMC Has Lack of Length Validation for s Parameter in GET Requests (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-54421 and fix it if it is affected.

What it is: CVE-2025-54421 is a high-severity cross-site scripting vulnerability in NamelessMC Nameless, published on 18 Aug 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-54421 exists.

Affected product: NamelessMC Nameless. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-54421/ (Markdown: https://insights.sbomify.com/CVE-2025-54421/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-54421
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-54421
- OSV: https://osv.dev/vulnerability/CVE-2025-54421

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-54421/
Summaries are generated and may contain mistakes; the official description above is the record.