VULNERABILITY INTELLIGENCE
CVE-2026-1555
CVSS score9.8 CRITICAL
EPSS probability0.98%
CISA KEVNot currently listed
Published2026-04-15
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Weakness classification
- security@wordfence.com: CWE-434