Is CVE-2026-50539 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-50539?

CVE-2026-50539 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-50539

Description

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.