CVE-2026-50539

{"id": "CVE-2026-50539", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-50539", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-28T16:01:06.316667Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "xibosignage", "product": "xibo-cms", "versions": [{"status": "affected", "version": "< 4.4.3"}]}]}], "published": "2026-10-28T16:17:07.733", "references": [{"url": "https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74", "source": "security-advisories@github.com"}, {"url": "https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3", "source": "security-advisories@github.com"}, {"url": "https://github.com/xibosignage/xibo-cms/pull/3487", "source": "security-advisories@github.com"}, {"url": "https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3", "source": "security-advisories@github.com"}, {"url": "https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta", "source": "security-advisories@github.com"}, {"url": "https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-862"}]}], "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."}], "lastModified": "2026-10-29T15:07:18.743", "sourceIdentifier": "security-advisories@github.com"}