CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What the vulnerability does
The Instant Appointment plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'insapp_upload_image_as_attachment' function in all versions up to, and including, 1.2. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Explanation of Vulnerability in Simple Terms
Instant Appointment versions 1.2 and earlier allow unauthenticated attackers to upload files without restriction. An attacker can upload malicious files to the server over the network without needing credentials or user interaction. This can lead to remote code execution, data theft, or site takeover depending on where uploaded files are stored and executed.
What an attacker can do
Upload malicious files to the server and potentially run code or steal data.
Potential impact on your site
Attackers can compromise your site by uploading and executing malicious code without any credentials.
Conditions required to exploit
Network access only; no authentication or user interaction required.
Key dates
External resources
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