CVE-2026-84999 Pie Register Premium - Unrestricted File Upload

Pie Register Premium WordPress plugin <= 3.8.4.0 contains an unrestricted file upload vulnerability caused by improper validation and lack of nonce or capability checks in piereg_file_upload, letting unauthenticated attackers upload executable files and achieve remote code execution.

CVSS base score 9.8 /10
Critical
CISA KEV
Exploited in the wild
Public exploit
None known
Authentication
Not required
EPSS
0.48% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Unrestricted File Upload
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
28 October 2026
Updated
29 October 2026
Weakness
CWE-434

Vendor fix

Update to the latest version of Pie Register Premium plugin.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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