---
id: CVE-2026-110230
title: >-
  XBackBone through 3.8.2 contains a missing authorization vulnerability that
  allows authenticated users to change other users' upload share codes via the
  POST /upload/{id}/vanity route
summary: >-
  XBackBone through 3.8.2 contains a missing authorization vulnerability that
  allows authenticated users to change other users' upload share codes via the
  POST /upload/{id}/vanity route. Attackers can supply sequential upload ids to
  MediaC…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-862
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T20:17:27.987'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110230'
references:
  - url: 'https://github.com/sergix44/xbackbone'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sergix44/xbackbone/blob/226af4f0cec218f563da6d53ececfa4708e6f3e7/app/Controllers/MediaController.php#L204-L229
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sergix44/xbackbone/commit/5e91a2a9859d20e41ee2e2403cfbe673804f6221
    label: disclosure@vulncheck.com
  - url: 'https://github.com/sergix44/xbackbone/pull/671'
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/ByAj-Xoifl'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/xbackbone-through-3.8.2-missing-authorization-via-upload-vanity-endpoint
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-13T19:43:28.941Z'
---

## Overview

XBackBone through 3.8.2 contains a missing authorization vulnerability that allows authenticated users to change other users' upload share codes via the POST /upload/{id}/vanity route. Attackers can supply sequential upload ids to MediaController::createVanity() to break existing share links and hijack the freed codes with their own uploads.

## Remediation

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