What is CVE-2026-104028?

CVE-2026-104028 is a critical-severity vulnerability in Anton Extensions, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-10-11.

How severe is CVE-2026-104028?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Anton Extensions

CVE-2026-104028

The Anton Extensions WordPress plugin through 1.2.2 does not perform any capability check, nonce verification, or file-type validation before writing attacker-supplied content to an attacker-chosen path, allowing unauthenticated attackers to upload arbitrary PHP files and achieve remote code execution.

Vulnerability class: Unrestricted File Upload

Published 2026-10-11 · last modified 2026-10-11.

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

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Anton Extensions

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

wpscan.com/vulnerability/0be8a03e-d854-48db-bdc0-1beead3d7b91/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-104028?: CVE-2026-104028 is a critical-severity vulnerability in Anton Extensions, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-10-11.
How severe is CVE-2026-104028?: Critical severity. CVSS v3 base score is 9.8 out of 10.