{"id":"CVE-2026-50539","state":"PUBLISHED","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.","publishedAt":"2026-10-28T15:31:12.074Z","updatedAt":"2026-10-28T16:06:48.627Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["xibosignage xibo-cms"],"affected":[{"vendor":"xibosignage","product":"xibo-cms","versions":[{"version":"< 4.4.3","status":"affected"}]}],"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"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/50xxx/CVE-2026-50539.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50539","state":"PUBLISHED","datePublished":"2026-10-28T15:31:12.074Z","dateUpdated":"2026-10-28T16:06:48.627Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-04T20:37:18.653Z"},"containers":{"cna":{"title":"Xibo: Missing Object-Level Authorization on /notification/export/{id} Allows Authenticated Users to Download Arbitrary Attachments","descriptions":[{"lang":"en","value":"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":[{"vendor":"xibosignage","product":"xibo-cms","versions":[{"version":"< 4.4.3","status":"affected"}]}],"references":[{"url":"https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6","name":"https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/xibosignage/xibo-cms/pull/3487","name":"https://github.com/xibosignage/xibo-cms/pull/3487","tags":["x_refsource_MISC"]},{"url":"https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74","name":"https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74","tags":["x_refsource_MISC"]},{"url":"https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3","name":"https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3","tags":["x_refsource_MISC"]},{"url":"https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3","name":"https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3","tags":["x_refsource_MISC"]},{"url":"https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta","name":"https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-28T15:31:12.074Z"},"source":{"advisory":"GHSA-p4pg-v57g-7jf6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-28T16:01:06.316667Z","id":"CVE-2026-50539","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-28T16:06:48.627Z"}}]}}}