The Swiss Toolkit For WP plugin for WordPress is vulnerable to arbitrary file upload due to a flawed file type validation bypass in the `upload_extension_files()` function in all versions up to, and including, 1.4.6. The `upload_extension_files()` function hooks into WordPress's `wp_check_filetype_and_ext` filter and uses `strpos()` to check if a filename contains a configured extension string, rather than verifying the actual file extension. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files (including PHP) on the affected site's server which may make remote code execution possible, granted the "Enhanced Multi-Format Image Support" feature is enabled with at least one extension (e.g., avif) in the allowed formats.
References
Configurations
No configuration.
History
No history.
Information
Published : 2026-07-11 05:16
Updated : 2026-07-13 16:59
NVD link : CVE-2026-2354
Mitre link : CVE-2026-2354
CVE.ORG link : CVE-2026-2354
JSON object : View
Products Affected
No product.
CWE
CWE-434
Unrestricted Upload of File with Dangerous Type
