{"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":0.30882,"slug":"CVE-2026-50539","body":"## Overview\n\nXibo 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.\n\n## Affected\n\n- `xibo-cms < 4.4.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}