{"id":"CVE-2020-15957","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.","aliases":["GHSA-5m5q-3qw2-3xf3"],"modified":"2026-07-09T02:49:27.701192Z","published":"2020-07-30T14:15:12.260Z","references":[{"type":"ADVISORY","url":"https://github.com/DP-3T/dp3t-sdk-backend/compare/v1.0.4...v1.1.0"},{"type":"ADVISORY","url":"https://github.com/dp-3T/dp3t-sdk-backend"},{"type":"FIX","url":"https://github.com/DP-3T/dp3t-sdk-backend/security/advisories/GHSA-5m5q-3qw2-3xf3"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dp-3t/dp3t-sdk-backend","events":[{"introduced":"0"},{"fixed":"b8c6476303097b195f084587d0854997146c79f4"}],"database_specific":{"cpe":"cpe:2.3:a:dp3t-backend-software_development_kit_project:dp3t-backend-software_development_kit:*:*:*:*:*:*:*:*","source":"CPE_RANGE","extracted_events":[{"introduced":"0"},{"fixed":"1.1.1"}]}}],"versions":["v1.1.0","v1.0.5","v1.0.4","v1.0.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15957.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}