{"id":"CVE-2026-50539","revision":null,"records":[{"revision":"d458ea1811ad4ecbb149cab0f916e905","observedAt":"2026-10-28T17:46:48.824+00:00","statement":{"source":"cve-program","id":"CVE-2026-50539","aliases":[],"title":"Xibo: Missing Object-Level Authorization on /notification/export/{id} Allows Authenticated Users to Download Arbitrary Attachments","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.","state":0,"publishedAt":"2026-10-28T15:31:12.074+00:00","modifiedAt":"2026-10-28T16:06:48.627+00:00","affected":[{"ecosystem":"Vendor product","name":"xibo-cms","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"xibosignage\",\n                    \"product\": \"xibo-cms\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.4.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6","https://github.com/xibosignage/xibo-cms/pull/3487","https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74","https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3","https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3","https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-50539","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-50539","identifiers":["CVE-2026-50539"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-10-31T03:47:09.5766450+00:00","complete":true,"records":1094,"lastAttemptAt":"2026-10-31T03:47:09.576645+00:00","lastSuccessAt":"2026-10-31T03:47:09.732237+00:00","error":null,"lastVerifiedAt":"2026-10-31T03:47:09.7322372+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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