EUVD-2026-80667
GHSA-h72m-g9jg-f5vg
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/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
Network-reachable admin-api endpoint (AV:N/AC:L), exploitable by any authenticated low-privilege user (PR:L), integrity-only impact from deleting approval steps (I:H), no data disclosure or outage (C:N/A:N).
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5DescriptionCVE.org
yshop-crm through 2.1.3 fails to enforce authorization checks on the CrmFlowController deleteFlowStep endpoint, allowing any authenticated back-office user to delete arbitrary approval workflow steps. Attackers can invoke the DELETE /admin-api/crm/flow/delete-step endpoint without required permissions to remove approval steps that control contract, receivable, and invoice finalization processes.
AnalysisAI
Missing authorization in yshop-crm 2.1.3 and earlier lets any authenticated back-office (admin-api) user delete arbitrary approval-workflow steps via DELETE /admin-api/crm/flow/delete-step, bypassing the permission check that should restrict this to workflow administrators. The result is an integrity-only compromise of the approval chains that gate contract, receivable, and invoice finalization; there is no confidentiality or availability impact, and the CVE record's CVSS 4.0 score of 7.1 maps to an independent CVSS 3.1 assessment of AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N, i.e. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a valid authenticated back-office (admin-api) user account of any privilege level - the flaw is that the deleteFlowStep endpoint (DELETE /admin-api/crm/flow/delete-step) omits the required permission check, so any logged-in staff user, not just workflow administrators, can invoke it. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but moderate-priority issue best understood as a missing-authorization (CWE-862) integrity flaw, not a critical takeover. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch or fixed version is identified in the available data, so the primary action is to add the missing server-side authorization check: annotate CrmFlowController.deleteFlowStep with the same permission/role guard used for other admin-api CRM endpoints (e.g. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all yshop-crm 2.1.3 and earlier deployments, confirm exposure of DELETE /admin-api/crm/flow/delete-step to non-workflow-administrator authenticated back-office accounts, restrict admin-api access to trusted networks, and turn on audit logging and alerts for workflow-step deletion. …
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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