---
id: CVE-2026-105123
title: >-
  W (vincent-peugnet/wcms) through 3.18.0 contains a remote code execution
  vulnerability that allows authenticated editors to write arbitrary files by
  abusing the unvalidated path in POST /api/v0/media/upload/[*:path]
summary: >-
  W (vincent-peugnet/wcms) through 3.18.0 contains a remote code execution
  vulnerability that allows authenticated editors to write arbitrary files by
  abusing the unvalidated path in POST /api/v0/media/upload/[*:path]. Attackers
  can upload…
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-434
vendor: vincent-peugnet
product: wcms
affected:
  - wcms <= 3.18.0
published: '2026-10-04'
updated: '2026-10-04'
sourceUpdated: '2026-10-04T00:16:35.703'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105123'
references:
  - url: 'https://github.com/vincent-peugnet/wcms'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/vincent-peugnet/wcms/blob/cda5bcdb95dbdb1e804fdfe0e5fd2e2b2f8a90e2/app/class/Controllerapimedia.php#L24-L44
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/vincent-peugnet/wcms/blob/cda5bcdb95dbdb1e804fdfe0e5fd2e2b2f8a90e2/app/class/Media.php#L98
    label: disclosure@vulncheck.com
  - url: 'https://github.com/vincent-peugnet/wcms/issues/662'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/w-wcms-through-3.18.0-rce-and-arbitrary-file-write-via-media-upload-api
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-03T23:50:15.754Z'
---

## Overview

W (vincent-peugnet/wcms) through 3.18.0 contains a remote code execution vulnerability that allows authenticated editors to write arbitrary files by abusing the unvalidated path in POST /api/v0/media/upload/[*:path]. Attackers can upload .php files executed by the web server, use encoded ../ sequences to write outside the media directory, and delete arbitrary files via DELETE /api/v0/media/[*:path].

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.