Critical severity9.8NVD Advisory· Published Apr 15, 2026· Updated Apr 22, 2026

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.

Patches

Vulnerability mechanics

References

github.com/owen0o0/WebStack/blob/master/inc/ajax.phpnvd
github.com/owen0o0/WebStack/tree/masternvd
www.wordfence.com/threat-intel/vulnerabilities/id/b97805de-1b47-4c9f-baae-2e37c1b78570nvd

News mentions

Wordfence Intelligence Weekly WordPress Vulnerability Report (April 13, 2026 to April 19, 2026)
Wordfence Blog · Apr 23, 2026

cvss	0.637
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000