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Vulnerability · Published Oct 28, 2026 · Assigned by GitHub_M

CVE-2026-50539Xibo: Missing Object-Level Authorization on /notification/export/{id} Allows Authenticated Users to Download Arbitrary Attachments

Medium 6.5

In plain English

A medium-severity missing authorization in xibo-cms from xibosignage. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 69.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
xibosignage xibo-cms < 4.4.3

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References