---
id: CVE-2026-104471
title: >-
  YesWiki before 4.6.7 contains an unrestricted file upload vulnerability that
  allows authenticated admins to write remote files into the web-accessible
  files/ directory via Bazar CSV import preview
summary: >-
  YesWiki before 4.6.7 contains an unrestricted file upload vulnerability that
  allows authenticated admins to write remote files into the web-accessible
  files/ directory via Bazar CSV import preview. Attackers can import a CSV
  whose file o…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-434
vendor: YesWiki
product: yeswiki
affected:
  - yeswiki < 4.6.7
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T14:17:09.137'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104471'
references:
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-v3gq-c7c6-mxw3'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-unrestricted-file-upload-via-bazar-csv-import
    label: disclosure@vulncheck.com
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-v3gq-c7c6-mxw3'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-02T13:42:51.998929Z'
ingestedAt: '2026-10-02T12:17:44.350Z'
---

## Overview

YesWiki before 4.6.7 contains an unrestricted file upload vulnerability that allows authenticated admins to write remote files into the web-accessible files/ directory via Bazar CSV import preview. Attackers can import a CSV whose file or image field references a remote .php URL, which is saved without extension checks and executed as server-side code.

## Remediation

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