Security advisory

{
  "id": "d83b2c4bddcc828407c9617ada333cf84d4d577ea3cb3c04bd3ebfc9f7027d96",
  "url": "https://osv.dev/vulnerability/CVE-2020-13163",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-13163",
    "summary": "em-imap 0.5 uses the library eventmachine in an insecure way that allows an attacker to perform a man-in-the-middle attack against users of the library. The hostname in a TLS server certificate is not verified.",
    "evidence": "osv:CVE-2020-13163",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-13163",
      "aliases": [
        "CVE-2020-13163",
        "GHSA-4f68-49qq-h392"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/conradirwin/em-imap",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c46cda5c04b16abe17706121e1489304821d942f"
                },
                {
                  "last_affected": "c46cda5c04b16abe17706121e1489304821d942f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:em-imap_project:em-imap:0.5:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.5"
                      },
                      {
                        "last_affected": "0.5"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.5",
            "v0.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-13163.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:47.000233987Z",
      "provider": "osv",
      "references": [
        "https://github.com/ConradIrwin/em-imap/issues/25",
        "https://securitylab.github.com/advisories/GHSL-2020-095-conradirwin-em-imap"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-13163",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382936,
  "published_at": "2020-05-19T22:15:12.09+00:00"
}