EUVD-2026-87899
GHSA-2hrm-754x-j578
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Network AJAX action (AV:N/AC:L), but requires a subsite-admin account so PR:H; arbitrary file write/delete → RCE yields full C:H/I:H/A:H (a case for S:C exists since it crosses the subsite authority boundary, but kept S:U per the single OS/component).
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
6DescriptionCVE.org
The Malcure Malware Shield - Removal, Repair, Monitor WordPress plugin before 19.9.7 does not perform an authorisation check on one of its AJAX actions, allowing users with a subsite administrator role on a multisite network to write and delete arbitrary files in the network's shared filesystem, which can lead to remote code execution.
Articles & Coverage 2
AnalysisAI
Malcure Malware Shield (Removal, Repair, Monitor) before 19.9.7 fails to enforce an authorization check on an AJAX action, allowing an authenticated subsite administrator on a WordPress multisite network to write and delete arbitrary files in the network's shared filesystem, which can lead to remote code execution. The vulnerability requires a multisite installation and an existing privileged account (CVSS PR:H); it is not exploitable on single-site installs or by unauthenticated users, and SSVC records Automatable:no. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a WordPress MULTISITE network installation with the Malcure Malware Shield plugin at a version before 19.9.7, AND the attacker must already hold a subsite administrator role on that network (PR:H). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are internally consistent and point to a genuine but bounded threat. … 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 | Vendor-released patch: 19.9.7 (upgrade the Malcure Malware Shield - Removal, Repair, Monitor plugin to version 19.9.7 or later, which adds the missing authorization check). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all WordPress multisite installations using Malcure Malware Shield versions before 19.9.7 and apply the vendor-released patch to version 19.9.7 or later; if immediate patching is not feasible, temporarily disable the plugin or restrict AJAX actions to trusted users. …
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today