cskefu File Upload MediaController.java upload cross site scripting

{
  "id": "3b36e2091685aca6bd529c971af4072a3697cb31d6346545b22f607b988bce54",
  "url": "https://osv.dev/vulnerability/CVE-2026-2557",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cskefu File Upload MediaController.java upload cross site scripting",
    "summary": "A vulnerability was detected in cskefu up to 8.0.1. Impacted is the function Upload of the file com/cskefu/cc/controller/resource/MediaController.java of the component File Upload. The manipulation results in cross site scripting. The attack may be launched remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
    "evidence": "osv:CVE-2026-2557",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-2557",
      "aliases": [
        "CVE-2026-2557"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cskefu/cskefu",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "568a0e6b607ffbe325296587390446ef3acc9482"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:cskefu:cskefu:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "8.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "8.0.1",
            "8.0.0.RC2",
            "8.0.0.RC1",
            "7.0.1",
            "7.0.0",
            "5.1.1",
            "5.1.0",
            "5.0.0",
            "3.10.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2557.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.177638743Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2557.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-2557",
        "https://vuldb.com/?id.346165",
        "https://vuldb.com/?submit.750729",
        "https://vuldb.com/?ctiid.346165",
        "https://fx4tqqfvdw4.feishu.cn/docx/ZqvtdTniToQMw0xZL94cTpuTnac"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79",
          "CWE-94"
        ],
        "cna_assigner": "VulDB",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.0.0"
                  },
                  {
                    "last_affected": "8.0.0"
                  },
                  {
                    "introduced": "8.0.1"
                  },
                  {
                    "last_affected": "8.0.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2557.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-2557",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497261,
  "published_at": "2026-02-16T13:02:39.281+00:00"
}