Security advisory

{
  "id": "aa50e14043d16fc86d819f2a3fa03a5ccfa2ab7c3f8993189b9ba503fc107b16",
  "url": "https://osv.dev/vulnerability/CVE-2021-4251",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-4251",
    "summary": "A vulnerability classified as problematic was found in as. This vulnerability affects the function getFullURL of the file include.cdn.php. The manipulation leads to cross site scripting. The attack can be initiated remotely. The name of the patch is 4acad1e3d2c34c017473ceea442fb3e3e078b2bd. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-216208.",
    "evidence": "osv:CVE-2021-4251",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-4251",
      "aliases": [
        "CVE-2021-4251"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/andrewsauder/as",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4acad1e3d2c34c017473ceea442fb3e3e078b2bd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "4acad1e3d2c34c017473ceea442fb3e3e078b2bd"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4251.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:05.687815441Z",
      "provider": "osv",
      "references": [
        "https://vuldb.com/?id.216208",
        "https://github.com/andrewsauder/as/commit/4acad1e3d2c34c017473ceea442fb3e3e078b2bd"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:as_project:as:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "as_project:as",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "2021-11-03"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-4251",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384855,
  "published_at": "2022-12-18T22:15:10.167+00:00"
}