Vulnerability · Published Apr 15, 2026 · Assigned by Wordfence
CVE-2026-1555WebStack <= 1.2024 - Unauthenticated Arbitrary File Upload
Critical 9.8
In plain English
A critical-severity unrestricted file upload in WebStack from Owen. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
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 (as reported)
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H