Security advisory

{
  "id": "dc5eb56a3bfd30b45bc80f9d7eb172806aab9d88222ca1e321804d56592ed7ff",
  "url": "https://osv.dev/vulnerability/CVE-2021-3312",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3312",
    "summary": "An XML external entity (XXE) vulnerability in Alkacon OpenCms 11.0, 11.0.1 and 11.0.2 allows remote authenticated users with edit privileges to exfiltrate files from the server's file system by uploading a crafted SVG document.",
    "evidence": "osv:CVE-2021-3312",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-3312",
      "aliases": [
        "CVE-2021-3312",
        "GHSA-g6v7-vqhx-6v6c"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/alkacon/opencms-core",
              "type": "GIT",
              "events": [
                {
                  "introduced": "bc104acc75d2277df5864da939a1f2de5fdee504"
                },
                {
                  "last_affected": "111fa04876f65f4cccd35e4086a3cbd26ab930f8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:alkacon:opencms:11.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "11.0-NA"
                      },
                      {
                        "last_affected": "11.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:alkacon:opencms:11.0.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "11.0.1"
                      },
                      {
                        "last_affected": "11.0.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:alkacon:opencms:11.0.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "11.0.2"
                      },
                      {
                        "last_affected": "11.0.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "11.0-NA",
            "11.0.1",
            "11.0.2",
            "build_11_0_2",
            "build_11_0_1",
            "build_11_0_0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3312.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:46.727204818Z",
      "provider": "osv",
      "references": [
        "https://github.com/alkacon/opencms-core/releases",
        "https://github.com/alkacon/opencms-core/issues/725"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-3312",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384611,
  "published_at": "2021-10-08T15:15:09.217+00:00"
}