Security advisory

{
  "id": "202252043e4129680ef6277ace4018e8331b59544693c2422fbf963f73ba006f",
  "url": "https://osv.dev/vulnerability/CVE-2020-25821",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-25821",
    "summary": "peg-markdown 0.4.14 has a NULL pointer dereference in process_raw_blocks in markdown_lib.c. NOTE: This vulnerability only affects products that are no longer supported by the maintainer",
    "evidence": "osv:CVE-2020-25821",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-25821",
      "aliases": [
        "CVE-2020-25821"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jgm/peg-markdown",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1d1f2c5d4dceae8ff15d3ac2d03fafa9f5435deb"
                },
                {
                  "last_affected": "1d1f2c5d4dceae8ff15d3ac2d03fafa9f5435deb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:peg-markdown_project:peg-markdown:0.4.14:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.4.14"
                      },
                      {
                        "last_affected": "0.4.14"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.4.14"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-25821.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:54.740258470Z",
      "provider": "osv",
      "references": [
        "https://github.com/jgm/peg-markdown/issues/43"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-25821",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384029,
  "published_at": "2020-09-23T04:15:11.133+00:00"
}