XiboSignage xibo-cms up to 4.4.2 Notification Export {id} id improper authorization

Summaryinfo

A vulnerability has been found in XiboSignage xibo-cms up to 4.4.2 and classified as problematic. Affected by this issue is some unknown functionality of the file /notification/export/{id} of the component Notification Export. This manipulation of the argument ID causes improper authorization. This vulnerability is handled as CVE-2026-50539. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in XiboSignage xibo-cms up to 4.4.2. It has been declared as problematic. Affected by this vulnerability is an unknown part of the file /notification/export/{id} of the component Notification Export. The manipulation of the argument id with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-50539 since 06/04/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 4.4.3 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• XiboSignage

Name

• xibo-cms

Version

• 4.4.0
• 4.4.1
• 4.4.2

Website

• Product: https://github.com/xibosignage/xibo-cms/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion