Security advisory

{
  "id": "ed10eda8019af52abc50c0bfb3349e2c546c436df9bbd42cbd6ecc3c82d7f6e6",
  "url": "https://osv.dev/vulnerability/CVE-2021-3355",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3355",
    "summary": "A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.",
    "evidence": "osv:CVE-2021-3355",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-3355",
      "aliases": [
        "CVE-2021-3355"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/eddy8/lightcms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ff92c23144082108389aff20e3ce3c2ca30065d8"
                },
                {
                  "last_affected": "ff92c23144082108389aff20e3ce3c2ca30065d8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:lightcms_project:lightcms:1.3.4:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.3.4"
                      },
                      {
                        "last_affected": "1.3.4"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.3.4",
            "v1.3.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3355.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:44.342782117Z",
      "provider": "osv",
      "references": [
        "https://github.com/eddy8/LightCMS/issues/18",
        "https://gist.github.com/Peithon/1c628ded0c4fc96c6331c3cce1d0c69b",
        "https://www.exploit-db.com/exploits/49598"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-3355",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386046,
  "published_at": "2021-02-24T15:15:13.933+00:00"
}