CVE-2026-15509

MEDIUM 6.3

Leantime JSON-RPC Endpoint addUser improper authorization

CVSS Score

6.3

EPSS Score

0.3%

EPSS Percentile

25th

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.

CWE	CWE-285 CWE-266
Vendor	n/a
Product	leantime
Published	Jul 12, 2026
Last Updated	Jul 15, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / Leantime

3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/377838 vuldb.com: https://vuldb.com/vuln/377838/cti vuldb.com: https://vuldb.com/cve/CVE-2026-15509 vuldb.com: https://vuldb.com/submit/846167 bytium.com: https://bytium.com/insights/leantime-priv-escalation-vulnerability-low-priv-to-owner

Credits

Jobyer Ahmed (Bytium) 🔍 suffer (VulDB User) suffer (VulDB User) VulDB CNA Team