# CVE-2024-49366: Nginx UI's json field can construct a directory traversal payload, causing arbitrary files to be written

> Attackers can write arbitrary files to the server via path traversal in Nginx UI, potentially leading to privilege escalation.

- **Severity:** High 7.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Oct 2024
- **Updated:** 21 Oct 2024
- **Also known as:** GHSA-prv4-rx44-f7jr

## What is CVE-2024-49366?

CVE-2024-49366 is a high-severity path traversal vulnerability in 0xJacky nginx-ui, published on 21 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Nginx UI is a web user interface for the Nginx web server. Nginx UI v2.0.0-beta.35 and earlier gets the value from the json field without verification, and can construct a value value in the form of `../../`. Arbitrary files can be written to the server, which may result in loss of permissions. Version 2.0.0-beta.26 fixes the issue.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2024-49366?

It affects 1 product.


Products: Nginxui Nginx Ui.

## How do I fix CVE-2024-49366?

No fix has been published for CVE-2024-49366 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-49366 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-49366 exists.

## Other vulnerabilities in 0xJacky nginx-ui

- [CVE-2026-33032](https://insights.sbomify.com/CVE-2026-33032/): Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover (critical 9.8)
- [CVE-2026-27944](https://insights.sbomify.com/CVE-2026-27944/): Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure (critical 9.8)
- [CVE-2024-23827](https://insights.sbomify.com/CVE-2024-23827/): Nginx-UI arbitrary file write through the Import Certificate feature (critical 9.8)
- [CVE-2026-107806](https://insights.sbomify.com/CVE-2026-107806/): Nginx UI: Authenticated Remote Code Execution via Backup Restore App Config Overwrite (critical 9.4)
- [CVE-2026-33026](https://insights.sbomify.com/CVE-2026-33026/): nginx-ui Backup Restore Allows Tampering with Encrypted Backups (critical 9.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-49366 and fix it if it is affected.

What it is: CVE-2024-49366 is a high-severity path traversal vulnerability in 0xJacky nginx-ui, published on 21 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-49366 exists.

Affected product: 0xJacky nginx-ui. 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-2024-49366/ (Markdown: https://insights.sbomify.com/CVE-2024-49366/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-49366
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-49366
- OSV: https://osv.dev/vulnerability/CVE-2024-49366

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-49366/
Summaries are generated and may contain mistakes; the official description above is the record.