CVE-2026-1555

WebStack <= 1.2024 - Unauthenticated Arbitrary File Upload

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

Owen · WebStack

CVSS v3.1 WORDFENCE

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.98% chance of exploitation in the next 30 days, 62nd percentile

Published

2026-04-15

Proof-of-concept exploits (3)

• Nxploited/CVE-2026-15559★ · 2026-04-17
• willygailo/WG-CVE-2026-1555-Linux0★ · 2026-06-08
• katranSefa/CVE-2026-15550★ · 2026-09-02

References

• CVE Record
• NVD entry

Related

• CVE-2026-3891
• CVE-2026-41940
• CVE-2025-13407
• CVE-2025-29009
• CVE-2025-39401
• CVE-2025-6440