Critical severity9.8OSV Advisory· Published Apr 15, 2026· Updated Jun 17, 2026
CVE-2026-1555
CVE-2026-1555
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Patches
Vulnerability mechanics
References
3News mentions
1- Wordfence Intelligence Weekly WordPress Vulnerability Report (April 13, 2026 to April 19, 2026)Wordfence Blog · Apr 23, 2026