Enable SVG, WebP, and ICO Upload <= 1.1.3 - Authenticated (Author+) Arbitrary File Upload via ICO Upload Bypass

The Enable SVG, WebP, and ICO Upload plugin for WordPress is vulnerable to arbitrary file upload in all versions up to, and including, 1.1.3. This is due to insufficient file type validation detecting ICO files, allowing double extension files with the appropriate magic bytes to bypass sanitization while being accepted as a valid ICO file. This makes it possible for authenticated attackers, with author-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.

An attacker needs Author access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Enable SVG, WebP, and ICO Upload 1.1.4 closes this, and updating the plugin is the step that ends it.

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• Alerts