CVE-2026-1555

The WebStack theme for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the io_img_upload() function in all versions up to, and including, 1.2024. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

Affected products

Webstack

Fix

Available

CVSS 3.1

9.8 CRITICAL

EPSS

1.0% (60th percentile)

Weakness

CWE-434

NVD status

Deferred

Published

2026-04-15