EUVD-2026-21035CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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
3Description
OpenPLC_V3 REST API endpoint checks for JWT presence but never verifies the caller's role. Any authenticated user with role=user can delete any other user, including administrators, by specifying their user ID or they can create new accounts with role=admin, escalating to full administrator access.
Analysis
Authorization bypass in OpenPLC_V3 REST API allows authenticated low-privilege users to delete administrator accounts or create new admin-level accounts. The API validates JWT token presence but fails to enforce role-based access control, enabling any user with basic authentication to escalate privileges to full administrator access or remove existing administrators by manipulating user ID parameters. …
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Remediation
Within 24 hours: Inventory all OpenPLC_V3 deployments and document current version numbers and user roles. Within 7 days: Implement network segmentation to restrict API access to trusted administrative networks only; disable or restrict REST API access where operationally feasible; audit and document all user accounts with admin privileges. …
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External POC / Exploit Code
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