Security advisory

{
  "id": "7adc3d9ff4261e757f991f60bff2245389245916a3d7b3175bdcba47fd71ceda",
  "url": "https://osv.dev/vulnerability/CVE-2021-35303",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-35303",
    "summary": "Cross Site Scripting (XSS) in Zammad 1.0.x up to 4.0.0 allows remote attackers to execute arbitrary web script or HTML via the User Avatar attribute.",
    "evidence": "osv:CVE-2021-35303",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-35303",
      "aliases": [
        "CVE-2021-35303"
      ],
      "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/zammad/zammad",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9bdf6d7b816d4e55501e13d12dc0d9b53cf16f5c"
                },
                {
                  "last_affected": "1200cd9d40abad6ee9bebf784f4b64e345302b14"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.0.0"
                      },
                      {
                        "last_affected": "4.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-35303.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:31.437876090Z",
      "provider": "osv",
      "references": [
        "https://zammad.com/en/advisories/zaa-2021-06"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-35303",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432802,
  "published_at": "2021-06-28T20:15:08.167+00:00"
}