Leantime JSON-RPC Endpoint addUser improper authorization
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Privilege escalation, Security bypass
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-266 and CWE-285.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Leantime | 3.0; 3.1; 3.2; 3.3; 3.4; 3.5; 3.6; 3.7; 3.8.0 | — | No fix listed | CNA |
- Leantime Vendor— Affected 3.0; 3.1; 3.2; 3.3; 3.4; 3.5; 3.6; 3.7; 3.8.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-15509
- 2026-10-03 Alias added: GHSA-q4cr-cr7q-hp2f
References
Sources
- CVE-2026-15509 · CVE Program
- CVE-2026-15509 · NVD
- FIRST EPSS
- GHSA-q4cr-cr7q-hp2f · GitHub Advisory Database · CC BY 4.0
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