CVE-2026-50539

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