EUVD-2026-65164
GHSA-vjvh-rjh6-h3qf
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Network-reachable upload needing only a Subscriber account (PR:L), no interaction; unrestricted upload yields RCE with host-wide scope change (S:C) and full C/I/A loss.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Subscriber Arbitrary File Upload in UltimateAI <= 3.1.0 versions.
AnalysisAI
Arbitrary file upload in the UltimateAI WordPress plugin (versions up to and including 3.1.0) lets any authenticated Subscriber-level user upload files with attacker-controlled types, per Patchstack (CVE-2026-32559, CWE-434). Because the plugin fails to validate uploaded file types, a low-privileged account can place a malicious PHP payload on the server, and with a CVSS 3.1 base score of 9.9 and scope change this typically escalates to full remote code execution and site takeover. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated WordPress account at Subscriber level or higher (CVSS PR:L) that can reach the UltimateAI plugin's file-upload feature; the plugin (≤ 3.1.0) must be installed and active. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals point to a genuine high priority for exposed WordPress sites, but with an important gate. … 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 | Upgrade UltimateAI to a version later than 3.1.0 once the vendor publishes a patched release; the input data does not confirm an exact fixed version, so verify the current version against the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/ultimate_ai/vulnerability/wordpress-ultimateai-plugin-3-1-0-arbitrary-file-upload-vulnerability?_s_id=cve) and the plugin changelog before relying on it. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all WordPress instances running UltimateAI plugin version 3.1.0 or earlier; disable the plugin immediately if non-critical, or if required for operations, restrict upload permissions to Administrator role only and implement server-level file-type restrictions blocking executable content. …
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Same technique File Upload
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External POC / Exploit Code
Leaving vuln.today