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CVE-2026-1555

CRITICAL 9.8 CVSS 3.1
Published
April 15, 2026
Last modified
October 26, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-434
CVSS vector
CVSS: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.

Affected products and versions

  • Owen WebStack — Up to and including 1.2024

References

  • github.com https://github.com/owen0o0/WebStack/blob/master/inc/ajax.php#L5
  • github.com https://github.com/owen0o0/WebStack/tree/master
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/b97805de-1b47-4c9f-baae-2e37c1b78570?source=cve
  • nvd.nist.gov Official NVD record