EUVD-2026-43251
GHSA-wf63-vfx8-m795
Severity by source
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible API requiring a low-privilege account (PR:L); settings write yields limited integrity and confidentiality impact; no availability or scope-change impact identified.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
3DescriptionCVE.org
A vulnerability was found in Leantime up to 3.8.0. Affected is the function Setting::saveSetting of the component API. The manipulation results in improper authorization. The attack may be performed from remote. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Broken access control in Leantime's API component (versions up to 3.8.0) allows authenticated low-privileged users to invoke the Setting::saveSetting function and modify application settings beyond their authorization level. The flaw is classified under CWE-285 (Improper Authorization) and is tagged as an authentication bypass and broken access control issue, meaning the application fails to enforce permission boundaries after login. A publicly available proof-of-concept exploit exists per VulDB and bytium.com; no CISA KEV listing was identified at time of analysis, and the vendor has not responded to disclosure.
Technical ContextAI
Leantime is an open-source project management application with an API layer. The vulnerable component is the Setting::saveSetting function within the API, responsible for persisting application configuration values. CWE-285 (Improper Authorization) describes a failure to correctly verify that an authenticated entity has the rights to access or modify a resource - distinct from authentication failure (CWE-287). Here, a user who is authenticated at a low-privilege level can reach a privileged settings-write operation without the application enforcing role-based or permission-based checks. The CPE string cpe:2.3:a:n/a:leantime:*:*:*:*:*:*:*:* covers all versions up to and including 3.8.0 with no version range exception noted.
RemediationAI
No vendor-released patch or fixed version has been identified at time of analysis - the vendor did not respond to the initial disclosure. Organizations running Leantime up to 3.8.0 should monitor the official Leantime repository and VulDB entry https://vuldb.com/cve/CVE-2026-15510 for patch availability. As compensating controls, restrict Leantime API access to trusted internal network segments or authenticated VPN sessions to reduce the attack surface, noting this does not eliminate the risk from compromised low-privilege internal accounts. Apply strict role enforcement at the network layer by blocking direct external access to API endpoints that handle settings operations. Audit current user account lists and remove any unnecessary accounts to minimize the population of potential low-privilege attackers. If Leantime supports API access tokens with scoped permissions, restrict issued tokens to read-only operations where possible. Each of these controls carries the trade-off of potentially disrupting legitimate remote workflow access.
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Same weakness CWE-285 – Improper Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today