Security advisory

{
  "id": "40b4ad4939a979ddb2f15e1c4726ac4efd357918bd9e5bb2864b39db2e6bde7c",
  "url": "https://osv.dev/vulnerability/CVE-2025-63589",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2025-63589",
    "summary": "A reflected XSS vulnerability exists in CMSimple_XH 1.8's index.php router when attacker-controlled path segments are not sanitized or encoded before being inserted into the generated HTML (navigation links, breadcrumbs, search form action, footer links). An attacker-controlled string placed in the URL path is reflected into multiple HTML elements, allowing execution of arbitrary JavaScript in victims' browsers visiting a crafted URL.",
    "evidence": "osv:CVE-2025-63589",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-63589",
      "aliases": [
        "CVE-2025-63589"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cmsimple-xh/cmsimple-xh",
              "type": "GIT",
              "events": [
                {
                  "introduced": "569ec8e70618892017558dbf5214d8d414322728"
                },
                {
                  "last_affected": "569ec8e70618892017558dbf5214d8d414322728"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:cmsimple-xh:cmsimple_xh:1.8.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.8.0-NA"
                      },
                      {
                        "last_affected": "1.8.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.8.0-NA",
            "1.8.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-63589.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.196013480Z",
      "provider": "osv",
      "references": [
        "https://github.com/cmsimple-xh/cmsimple-xh/blob/master/index.php",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/63xxx/CVE-2025-63589.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-63589",
        "https://github.com/cybercrewinc/CVE-2025-63589"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/63xxx/CVE-2025-63589.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-63589",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500325,
  "published_at": "2025-11-06T00:00:00+00:00"
}