---
id: CVE-2025-66449
title: ConvertXis a self-hosted online file converter
summary: >-
  ConvertXis a self-hosted online file converter. In versions prior to 0.16.0,
  the endpoint `/upload` allows an authenticated user to write arbitrary files
  on the system, overwriting binaries and allowing code execution. The upload
  functio…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-22
  - CWE-73
  - CWE-434
  - CWE-22
vendor: c4illin
product: convertx
affected:
  - convertx < 0.16.0
patched:
  - convertx 0.16.0
published: '2025-12-16'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T19:10:00.160'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-66449'
references:
  - url: >-
      https://github.com/C4illin/ConvertX/blob/4ae2aab66ace7cdcc14c5a16ecaaf2372b9ccbdf/src/pages/upload.tsx#L27-L30
    label: security-advisories@github.com
  - url: >-
      https://github.com/C4illin/ConvertX/commit/550f472451755d095cf5802bc91f403e85b7129e
    label: security-advisories@github.com
  - url: >-
      https://github.com/C4illin/ConvertX/security/advisories/GHSA-cpww-gwgc-p72r
    label: security-advisories@github.com
  - url: >-
      https://github.com/C4illin/ConvertX/security/advisories/GHSA-cpww-gwgc-p72r
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00784
epssPercentile: 0.54573
ingestedAt: '2026-10-07T19:44:15.701Z'
---

## Overview

ConvertXis a self-hosted online file converter. In versions prior to 0.16.0, the endpoint `/upload` allows an authenticated user to write arbitrary files on the system, overwriting binaries and allowing code execution. The upload function takes `file.name` directly from user supplied data without doing any sanitization on the name thus allowing for arbitrary file write. This can be used to overwrite system binaries with ones provided from an attacker allowing full code execution. Version 0.16.0 contains a patch for the issue.

## Affected

- `convertx < 0.16.0`

## Remediation

Upgrade past the affected range:

- `convertx 0.16.0`