Craft CMS 5.0.0-RC1 before 5.10.11 Stored XSS via site name

{
  "id": "1a4977bedeec21dba4e44d18aa7b15927acd78d00af8b028e61d06d257d43797",
  "url": "https://osv.dev/vulnerability/CVE-2026-84793",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Craft CMS 5.0.0-RC1 before 5.10.11 Stored XSS via site name",
    "summary": "Craft CMS versions from 5.0.0-RC1 before 5.10.11 contain a stored cross-site scripting vulnerability in the site name field that fails to sanitize input. Administrators can inject arbitrary JavaScript payloads in the site name that execute when other users view the control panel settings pages.",
    "evidence": "osv:CVE-2026-84793",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-84793",
      "aliases": [
        "CVE-2026-84793",
        "GHSA-5fjj-496j-2qqf"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/craftcms/cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "04755d93f86d07cc183db47db8a0eee106892e30"
                },
                {
                  "fixed": "9dece66d9d35f9f2615f5f2107c98d2334c71cfc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "5.0.0-RC1"
                      },
                      {
                        "fixed": "5.10.11"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "5.0.0-RC1"
                      },
                      {
                        "fixed": "5.10.11"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84793.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.296617015Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84793.json",
        "https://github.com/craftcms/cms/security/advisories/GHSA-5fjj-496j-2qqf",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-84793",
        "https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.11-stored-xss-via-site-name"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84793.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-84793",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513311,
  "published_at": "2026-09-02T11:11:09.939+00:00"
}