---
id: CVE-2026-80138
title: >-
  ClipBucket V5's web installer fails to properly validate or escape the
  php_cli_filepath parameter before passing it to shell execution
summary: >-
  ClipBucket V5's web installer fails to properly validate or escape the
  php_cli_filepath parameter before passing it to shell execution.
  Unauthenticated attackers can submit a crafted POST request to the installer
  with a malicious php_cli…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
published: '2026-08-25'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:43:32.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80138'
references:
  - url: 'https://github.com/MacWarrior/clipbucket-v5'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/MacWarrior/clipbucket-v5/blob/5.5.3-%23153/upload/cb_install/functions_install.php
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/MacWarrior/clipbucket-v5/blob/5.5.3-%23153/upload/includes/classes/system.class.php
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/MacWarrior/clipbucket-v5/commit/36e7c6cfd81f62a091d2aeef96a8fc2fc2d85dc4
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/clipbucket-v5-5.5.1-through-5.5.3-153-os-command-injection-via-installer-php-cli-filepath-parameter
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.01197
epssPercentile: 0.66789
ingestedAt: '2026-09-24T20:51:40.228Z'
---

## Overview

ClipBucket V5's web installer fails to properly validate or escape the php_cli_filepath parameter before passing it to shell execution. Unauthenticated attackers can submit a crafted POST request to the installer with a malicious php_cli_filepath value to execute arbitrary commands as the web server user.

## Remediation

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