CVE-2020-15957: DP3T-Backend-Software Development Kit Project DP3T-Backend-Software Development Kit

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

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.

Affected products

• DP3T-Backend-Software Development Kit Project DP3T-Backend-Software Development Kit: before 1.1.1 (fixed in 1.1.1)

Published 2020-07-30. Last modified 2026-06-17.