EUVD-2026-40044
GHSA-fgv8-397h-qgqf
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-reachable API requires low-privilege auth (PR:L); no scope change; partial low impacts across C/I/A match described unauthorized data access and manipulation.
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
Lifecycle Timeline
3DescriptionCVE.org
A flaw has been found in Feehi CMS up to 2.1.1. Affected by this issue is some unknown functionality of the file /api/users of the component API. This manipulation causes improper access controls. The attack can be initiated remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
AnalysisAI
Improper access control in Feehi CMS up to version 2.1.1 allows low-privileged remote attackers to perform unauthorized operations against the /api/users API endpoint. Exploitation of CWE-284 at this endpoint enables access to or manipulation of user data beyond what the authenticated role should permit, representing an authentication bypass at the authorization layer. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a valid low-privilege account on the target Feehi CMS instance (PR:L per CVSS 4.0 vector). … 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 constrained but meaningful risk profile: low attack complexity (AC:L, AT:N), network-reachable attack surface (AV:N), and low partial impacts across confidentiality, integrity, and availability (VC:L/VI:L/VA:L), but requiring at least low-level authentication (PR:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A low-privileged registered user of a Feehi CMS deployment sends a crafted HTTP request to the /api/users endpoint - potentially enumerating or querying accounts beyond their authorization scope. Because the endpoint lacks proper access control checks, the server returns sensitive user data (such as account listings or credentials) or permits unauthorized modifications, without the attacker needing elevated privileges. … |
| Remediation | No vendor-released patch has been identified at time of analysis - the project was notified via GitHub issue report but has not responded. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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