CVE-2017-20208
CRITICAL EXPLOITEDRegistrationMagic <3.7.9.3 - Code Injection
Title source: llmExploitation Summary
CVE-2017-20208 has been observed exploited in the wild (reported by VulnCheck KEV).
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 (3)
Core 3
Core References
Press/Media Coverage, Third Party Advisory
https://www.wordfence.com/blog/2017/10/3-zero-day-plugin-vulnerabilities-exploited-wild/
Scores
CVSS v3
9.8
EPSS
0.0064
EPSS Percentile
46.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
VulnCheck KEV
2017-10-02
CWE
CWE-502
Status
published
Products (2)
metagauss/registrationmagic
< 3.7.9.3
metagauss/RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login
< 3.7.9.3
Published
Oct 18, 2025
Tracked Since
Feb 18, 2026