CVE-2026-15509: Leantime JSON-RPC Endpoint addUser improper authorization
A vulnerability has been found in Leantime up to 3.8.0. This impacts the function editUser/addUser of the component JSON-RPC Endpoint. The manipulation of the argument role leads to improper authorization. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-15509?
CVE-2026-15509 has a medium severity rating of 6.3.
How do I fix CVE-2026-15509?
To fix CVE-2026-15509, update Leantime to the latest version where the vulnerability has been addressed.
What are the potential impacts of CVE-2026-15509?
CVE-2026-15509 can lead to improper authorization, allowing unauthorized users to manipulate user roles.
Which component is affected by CVE-2026-15509?
CVE-2026-15509 affects the editUser/addUser functions of the JSON-RPC Endpoint in Leantime.
Is CVE-2026-15509 exploitable remotely?
Yes, CVE-2026-15509 can be exploited remotely due to improper authorization in the affected component.