CVE-2026-50539
Xibo: Missing Object-Level Authorization on /notification/export/{id} Allows Authenticated Users to Download Arbitrary Attachments
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | xibosignage |
| Product | xibo-cms |
| Published | Oct 28, 2026 |
| Last Updated | Oct 28, 2026 |
Stay Ahead of the Next One
Get instant alerts for xibosignage xibo-cms
Be the first to know when new medium vulnerabilities affecting xibosignage xibo-cms are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
xibosignage / xibo-cms
< 4.4.3
References
github.com: https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6 github.com: https://github.com/xibosignage/xibo-cms/pull/3487 github.com: https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74 github.com: https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3 github.com: https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3 github.com: https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta