CVE-2026-15509
Leantime JSON-RPC Endpoint addUser improper authorization
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jul 12, 2026
- Updated
- Jul 15, 2026
- Reserved
- Jul 12, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 6.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 6.3 Medium | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 6.5 Medium | AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Leantimen/a |
|
References
- VDB-377838 | Leantime JSON-RPC Endpoint addUser improper authorizationvdb-entrytechnical-description
- VDB-377838 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- CVE-2026-15509 | CVE Analysis and Reportthird-party-advisory
- Submit #846167 | Leantime Leantime project management system 3.8.0 Privilege Escalation / Improper Authorizationthird-party-advisory
- https://bytium.com/insights/leantime-priv-escalation-vulnerability-low-priv-to-ownerexploit
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