Security advisory

{
  "id": "a47c19e1a1c4f86a590dde67ec2eabc32f1d3e99f99e599bb767e0d1b5f8e4ab",
  "url": "https://osv.dev/vulnerability/CVE-2020-11535",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-11535",
    "summary": "An issue was discovered in ONLYOFFICE Document Server 5.5.0. An attacker can craft a malicious .docx file, and exploit XML injection to enter an attacker-controlled parameter into the x2t binary, to rewrite this binary and/or libxcb.so.1, and execute code on a victim's server.",
    "evidence": "osv:CVE-2020-11535",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-11535",
      "aliases": [
        "CVE-2020-11535"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/onlyoffice/documentserver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d93c9b34667f5ed750309997bd84e9cde5cff213"
                },
                {
                  "last_affected": "d93c9b34667f5ed750309997bd84e9cde5cff213"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:onlyoffice:document_server:5.5.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.5.0"
                      },
                      {
                        "last_affected": "5.5.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.5.0",
            "ONLYOFFICE-DocumentServer-5.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-11535.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:45.871583263Z",
      "provider": "osv",
      "references": [
        "https://gist.github.com/andrewaeva/beb92d3d2f1c5672dbda5050e323f6a0",
        "https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#551"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-11535",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382891,
  "published_at": "2020-04-15T15:15:19.683+00:00"
}