Swiss Toolkit For WP: Dangerous file upload
Swiss Toolkit For WP is affected by dangerous file upload. Exploitation requires at least author-level access. Successful exploitation can place attacker-controlled executable content on the server and may lead to full site compromise. The published affected range is <= 1.4.6.
- Component
- Swiss Toolkit For WP
- Plugin slug
swiss-toolkit-for-wp- Affected
- <= 1.4.6
- Safe version
> 1.4.6- Published
- Jul 11, 2026
This CVE was published Jul 11, 2026 and is one of 4 known issues for this plugin.
Update, patch or deactivate.
Update Swiss Toolkit For WP to a release after 1.4.6, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H