Contact Form 7 <= 5.8.3 - Authenticated (Editor+) Arbitrary File Upload

Unrestricted Upload of File with Dangerous Type
CVE CVE-2023-6449
CVSS Medium (6.6)
Publicly Published November 30, 2023
Last Updated January 22, 2024
Researcher István Márton
Description

The Contact Form 7 plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'validate' function and insufficient blocklisting on the 'wpcf7_antiscript_file_name' function in versions up to, and including, 5.8.3. This makes it possible for authenticated attackers with editor-level capabilities or above to upload arbitrary files on the affected site's server, but due to the htaccess configuration, remote code cannot be executed in most cases. By default, the file will be deleted from the server immediately. However, in some cases, other plugins may make it possible for the file to live on the server longer. This can make remote code execution possible when combined with another vulnerability, such as local file inclusion.

References

1 affected software package

Software Type Plugin
Software Slug contact-form-7 (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 5.8.3
Patched Version
  • 5.8.4
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