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

Unrestricted Upload of File with Dangerous Type
CVE CVE-2019-11185
CVSS Critical (9.8)
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.

References

1 affected software package

Software Type Plugin
Software Slug wp-live-chat-support-pro (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 8.0.26
Patched Version
  • 8.0.27
This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.
License: Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy. License Detail.