Swiss Toolkit For WP <= 1.4.6 - Authenticated (Author+) Arbitrary File Upload via upload_extension_files()
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WP Messiah | Swiss Toolkit For WP | up to 1.4.6 | — | No fix listed | CNA |
- Swiss Toolkit For WP VendorWP Messiah Affected up to 1.4.6 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-2354
- 2026-10-03 Alias added: GHSA-xq2v-8qf4-3rg6
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/06bccd2e-6891-433a-9f5b-3ec0c30afef4?source=cve
- https://plugins.trac.wordpress.org/browser/swiss-toolkit-for-wp/tags/1.4.2/includes/plugins/class-boomdevs-swiss-toolkit-extension-supports.php#L95
- https://plugins.trac.wordpress.org/browser/swiss-toolkit-for-wp/tags/1.4.2/includes/plugins/class-boomdevs-swiss-toolkit-extension-supports.php#L49
- https://plugins.trac.wordpress.org/browser/swiss-toolkit-for-wp/trunk/includes/plugins/class-boomdevs-swiss-toolkit-extension-supports.php#L95
- https://plugins.trac.wordpress.org/browser/swiss-toolkit-for-wp/trunk/includes/plugins/class-boomdevs-swiss-toolkit-extension-supports.php#L49
More WP Messiah vulnerabilities
- TI-2025-36012 WordPress Ai Image Alt Text Generator for WP Plugin <= 1.1.5 - Broken Access Control Vulnerability CVSS 3.1HIGH 8.2
- TI-2024-04829 Swiss Toolkit For WP <= 1.0.7 - Authenticated (Contributor+) Authentication Bypass CVSS 3.1HIGH 8.8
- TI-2024-11380 Safe Ai Malware Protection for WP <= 1.0.17 - Missing Authorization to Unauthenticated Database Export CVSS 3.1HIGH 7.5
- TI-2026-00589 Frontis Blocks <= 1.1.6 - Unauthenticated Server-Side Request Forgery via 'url' Parameter CVSS 3.1HIGH 7.2
- TI-2025-41639 WordPress Frontis Blocks plugin <= 1.1.5 - Server Side Request Forgery (SSRF) vulnerability CVSS 3.1HIGH 7.2
- TI-2026-07625 Prime Elementor Addons <= 1.3.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Widget HTML Tag Settings CVSS 3.1MEDIUM 6.4
Sources
- CVE-2026-2354 · CVE Program
- CVE-2026-2354 · NVD
- FIRST EPSS
- GHSA-xq2v-8qf4-3rg6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences