A vulnerability was found in Leantime up to 3.8.0. It has been classified as critical. This impacts the function
editUser/addUser of the component JSON-RPC Endpoint. The manipulation of the argument role leads to improper authorization.
This vulnerability is uniquely identified as CVE-2026-15509. The attack is possible to be carried out remotely. Moreover, an exploit is present.
The vendor was contacted early about this disclosure but did not respond in any way.
