Critical severity · published Oct 18, 2025
CVE-2017-20208
RegistrationMagic - Custom Registration Forms <= 3.7.9.2 - PHP Object Injection
9.8
CVSS
0.7%
EPSS
No
On 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RC
RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login · metagauss
before 3.7.9.3 · source: vendor
RE
Registrationmagic · Metagauss
before 3.7.9.3 · source: NVD
Affected product
RC
RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login
metagauss
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-20208
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-20208
Patch
https://plugins.trac.wordpress.org/changeset/1733274/custom-registration-form-builder-with-submission-manager
Press/Media Coverage
https://www.wordfence.com/blog/2017/10/3-zero-day-plugin-vulnerabilities-exploited-wild/
Technical Description
https://www.wordfence.com/threat-intel/vulnerabilities/id/c2b79193-f8fc-4ea2-8973-fe292cfb926b?source=cve
More from RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login
9.8
CVE-2025-15403
RegistrationMagic <= 6.0.7.1 - Unauthenticated Privilege Escalation via admin_order
9.8
CVE-2024-10508
RegistrationMagic – User Registration Plugin with Custom Registration Forms <= 6.0.2.6 - Unauthenticated Privilege Escalation via Password Recovery
9.8
CVE-2023-2499
RegistrationMagic <= 5.2.1.0 - Authentication Bypass
8.8
CVE-2026-12158
RegistrationMagic <= 6.0.9.1 - Cross-Site Request Forgery to Privilege Escalation via 'rmc_assign_user_role_action' Parameter
8.8
CVE-2024-1991
RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login <= 5.3.0.0 - Authenticated (Subscriber+) Privilege Escalation