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Leantime CVE-2026-15510

| EUVDEUVD-2026-43251 LOW
Improper Authorization (CWE-285)
2026-07-12 VulDB GHSA-wf63-vfx8-m795
Authentication Bypass Leantime
2.1
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.1 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/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
vuln.today AI
5.4 MEDIUM

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.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Severity Changed
Jul 12, 2026 - 23:22 NVD
MEDIUM LOW
CVSS changed
Jul 12, 2026 - 23:22 NVD
5.3 (MEDIUM) 2.1 (LOW)
Analysis Generated
Jul 12, 2026 - 23:17 vuln.today

DescriptionCVE.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. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privilege Leantime credentials
Delivery
Send crafted POST to Setting::saveSetting API endpoint
Exploit
Application skips authorization check
Execution
Overwrite restricted application settings
Impact
Achieve unauthorized configuration control
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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated session with at least a low-privilege account on the target Leantime instance (CVSS PR:L confirmed). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 5.3 (Medium) reflects a network-accessible, low-complexity, low-privilege attack path with limited impact across confidentiality, integrity, and availability (VC:L/VI:L/VA:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with a standard low-privilege Leantime user account (such as a regular team member or guest) sends a crafted API request to the Setting::saveSetting endpoint, omitting or bypassing the expected authorization check. Because the function does not properly validate that the calling user holds the required administrative role, the request succeeds and the attacker can overwrite application settings - potentially redirecting integrations, altering notification addresses, or degrading application behavior. …
Remediation No vendor-released patch or fixed version has been identified at time of analysis - the vendor did not respond to the initial disclosure. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-15510 vulnerability details – vuln.today
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