{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.1.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "b8c6476303097b195f084587d0854997146c79f4"
            }
          ],
          "repo": "https://github.com/dp-3t/dp3t-sdk-backend",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "An issue was discovered in DP3T-Backend-SDK before 1.1.1 for Decentralised Privacy-Preserving Proximity Tracing (DP3T). When it is configured to check JWT before uploading/publishing keys, it is possible to skip the signature check by providing a JWT token with alg=none.",
  "id": "CVE-2020-15957",
  "modified": "2026-03-15T21:47:50.175249425Z",
  "published": "2020-07-30T14:15:12.260Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/dp-3T/dp3t-sdk-backend"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/DP-3T/dp3t-sdk-backend/compare/v1.0.4...v1.1.0"
    },
    {
      "type": "FIX",
      "url": "https://github.com/DP-3T/dp3t-sdk-backend/security/advisories/GHSA-5m5q-3qw2-3xf3"
    }
  ],
  "related": [
    "GHSA-5m5q-3qw2-3xf3"
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}