RegistrationMagic - Custom Registration Forms <= 3.7.9.2 - PHP Object Injection

Deserialization of Untrusted Data
CVE CVE-2017-20208
CVSS Critical (9.8)
Publicly Published October 2, 2017
Last Updated October 18, 2025
Researcher Brad Haas
Description

The RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login plugin for WordPress is vulnerable to PHP Object Injection in all versions up to 3.7.9.3 (exclusive) via deserialization of untrusted input from the is_expired_by_date() function. This makes it possible for unauthenticated attackers to inject a PHP Object. The additional presence of a POP chain allows attackers to fetch a remote file and install it on the site.

References

1 affected software package

Software Type Plugin
Software Slug custom-registration-form-builder-with-submission-manager (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 3.7.9.3
Patched Version
  • 3.7.9.3
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.