CVE-2026-15509: 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 t
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-15509
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-155090.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-15509 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Leantime
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-66416: Leantime 3.6.2 contains a cross-site request forgery vulnerability that allows unauthenticated…nvd · 2026-07-30
- highCVE-2026-66415: Leantime 3.6.2 contains a server-side request forgery and local file inclusion vulnerability t…nvd · 2026-07-30
- mediumCVE-2026-66414: Leantime 3.6.2 contains an open redirect vulnerability in the Login controller that allows una…nvd · 2026-07-30
- mediumCVE-2026-66412: Leantime 3.6.2 and prior contains a broken access control vulnerability that allows authentica…nvd · 2026-07-27
- mediumCVE-2026-15510: A vulnerability was found in Leantime up to 3.8.0. Affected is the function Setting::saveSetti…nvd · 2026-07-12
- highCVE-2026-59713: Leantime contains an OIDC login CSRF vulnerability in the verifyState() method that unconditio…nvd · 2026-07-06
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