CVE-2026-2354
HIGHCVSS v3.1: 8.8 · EPSS: 0.0033 (25.2 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 8.8 v3.1 · NVD
- EPSS
- 0.0033 (25.2 percentile) · FIRST.org
- CISA KEV
- No
- Type
- Unrestricted Upload · NVD CWE
- Attack conditions (CVSS vector)
- NetworkNo user interaction · Source: NVD Vector
- Published
- 2026-07-11 · Modified: 2026-07-11
- References
- Jump to references (5)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
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.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Reference https://plugins.trac.wordpress.org/browser/swiss-toolkit-for-wp/tags/1.4.2/includes/plugin…
- Reference https://plugins.trac.wordpress.org/browser/swiss-toolkit-for-wp/tags/1.4.2/includes/plugin…
- Reference https://plugins.trac.wordpress.org/browser/swiss-toolkit-for-wp/trunk/includes/plugins/cla…
- Reference https://plugins.trac.wordpress.org/browser/swiss-toolkit-for-wp/trunk/includes/plugins/cla…
- Vendor advisory https://www.wordfence.com/threat-intel/vulnerabilities/id/06bccd2e-6891-433a-9f5b-3ec0c30a…