NVD CRITICAL: CVE-2026-1555 — The WebStack theme for WordPress is vulnerable to arbitrary file uploads due to ...

Wednesday, April 15, 2026 at 04:17 AM UTC·Source: NIST NVD

Updated: Thursday, April 16, 2026 at 10:17 PM UTC

Executive Summary

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.

Analysis

Indicators of Compromise (1)

CVE (1)

CVE-2026-1555

NVD MITRE CVE

Source Attribution

Originally published by NIST NVD on Apr 15, 2026. Verified by: NIST.

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