CVE-2026-50539
Dashboard / Vulnerabilities / CVE-2026-50539
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.
References: https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3, https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50539.json, https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6, https://nvd.nist.gov/vuln/detail/CVE-2026-50539, https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74, https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3, https://github.com/xibosignage/xibo-cms/pull/3487
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