Arbitrary file upload in Mulika Mipl Grouped Checkout Fields For Woocommerce. Customize & Organize Fields.

CVE-2026-8778

The MIPL Grouped Checkout Fields for WooCommerce – Customize & Organize Checkout Fields. plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the `mipl_wc_upload_file` function in all versions up to, and including, 1.2.1. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

Vulnerability class: Unrestricted File Upload

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (66.4th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-8778: held from 0.011 to 0.011.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-8778?
CVE-2026-8778 is a critical-severity vulnerability in Mulika Mipl Grouped Checkout Fields For Woocommerce. Customize & Organize Fields., classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-09-11.
How severe is CVE-2026-8778?
Critical severity. CVSS v3 base score is 9.8 out of 10.