---
id: CVE-2026-50539
title: >-
  Xibo: Missing Object-Level Authorization on /notification/export/{id} Allows
  Authenticated Users to Download Arbitrary Attachments
summary: >-
  Xibo is an open source digital signage platform with a web content management
  system and Windows display player software. Prior to 4.4.3, missing
  object-level authorization on `/notification/export/{id}` allows an
  authenticated user to d…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-862
vendor: xibosignage
product: xibo-cms
affected:
  - xibo-cms < 4.4.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-28T16:01:06.316667Z'
published: '2026-10-28'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T16:06:48.627Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-50539'
references:
  - url: >-
      https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6
    label: >-
      https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6
  - url: 'https://github.com/xibosignage/xibo-cms/pull/3487'
    label: 'https://github.com/xibosignage/xibo-cms/pull/3487'
  - url: >-
      https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74
    label: >-
      https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74
  - url: >-
      https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3
    label: >-
      https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3
  - url: 'https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3'
    label: 'https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3'
  - url: 'https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta'
    label: 'https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta'
tags:
  - cve.org
ingestedAt: '2026-10-28T16:13:50.588Z'
epss: 0.00368
epssPercentile: 0.30863
---

## Overview

Xibo is an open source digital signage platform with a web content management system and Windows display player software. Prior to 4.4.3, missing object-level authorization on `/notification/export/{id}` allows an authenticated user to download attachments from any notification, including notifications created by administrators, by iterating over `sequential notification IDs`. Exploitation requires access to the `Notification Centre` to view past notifications, a privilege granted to non-administrators as standard. This issue is fixed in version 4.4.3.

## Affected

- `xibo-cms < 4.4.3`

## Remediation

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