WP Live Chat Support Pro <= 8.0.26 - Arbitrary File Upload

9.8
Unrestricted Upload of File with Dangerous Type
CVE CVE-2019-11185
CVSS 9.8 (Critical)
Publicly Published May 7, 2019
Last Updated January 22, 2024
Researcher Alert Logic

Description

The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file upload vulnerability. This results from an incomplete patch for CVE-2018-12426. Arbitrary file upload is achieved by using a non-blacklisted executable file extension in conjunction with a whitelisted file extension, and prepending "magic bytes" to the payload to pass MIME checks. Specifically, an unauthenticated remote user submits a crafted file upload POST request to the REST api remote_upload endpoint. The file contains data that will fool the plugin's MIME check into classifying it as an image (which is a whitelisted file extension) and finally a trailing .phtml file extension.

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Vulnerability Details for wp-live-chat-support-pro

Software Type Plugin
Software Slug wp-live-chat-support-pro
Patched? Yes
Remediation Update to version 8.0.27, or a newer patched version
Affected Version
  • <= 8.0.26
Patched Version
  • 8.0.27

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