{"schema":"threatline.record/2","record":{"id":"CVE-2026-50539","aliases":["GHSA-p4pg-v57g-7jf6"],"summary":"Xibo: Missing Object-Level Authorization on /notification/export/{id} Allows Authenticated Users to Download Arbitrary Attachments","details":"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.","categories":["Unclassified"],"product":"xibo-cms","vendor":"xibosignage","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-50539","source_modified_at":"2026-10-28T15:31:12.074Z","fetched_at":"2026-10-28T15:55:58.673066Z","product":"xibo-cms","vendor":"xibosignage","versions":[{"version":"< 4.4.3","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":6.5,"severity":"Medium","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-28T15:31:12.074Z","modified_at":"2026-10-28T15:31:12.074Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-50539","fetched_at":"2026-10-28T15:55:58.673066Z","source_modified_at":"2026-10-28T15:31:12.074Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/xibosignage/xibo-cms/pull/3487","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-28T15:31:12.074Z","content_hash":"a62e5e4f549049d41339f5f54ee13df1cce0ff9a29b1b5ff725756da4e391113"}}