CVE-2025-34077: CWE-434 Unrestricted Upload of File with Dangerous Type in Genetech Solutions WordPress Pie Register Plugin
An authentication bypass vulnerability exists in the WordPress Pie Register plugin ≤ 3.7.1.4 that allows unauthenticated attackers to impersonate arbitrary users by submitting a crafted POST request to the login endpoint. By setting social_site=true and manipulating the user_id_social_site parameter, an attacker can generate a valid WordPress session cookie for any user ID, including administrators. Once authenticated, the attacker may exploit plugin upload functionality to install a malicious plugin containing arbitrary PHP code, resulting in remote code execution on the underlying server.
AI Analysis
Technical Summary
This vulnerability in the WordPress Pie Register plugin (≤ 3.7.1.4) enables unauthenticated attackers to bypass authentication by submitting a specially crafted POST request to the login endpoint with social_site=true and a manipulated user_id_social_site parameter. This allows the attacker to generate a valid session cookie for any user ID, including administrators. Subsequently, the attacker can exploit the plugin's upload functionality to install a malicious plugin with arbitrary PHP code, leading to remote code execution on the underlying server. The issue involves CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-306 (Authentication Bypass), and CWE-94 (Improper Control of Generation of Code). The CVSS 4.0 base score is 10.0, indicating critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows unauthenticated attackers to impersonate any user, including administrators, and execute arbitrary PHP code on the server by uploading malicious plugins. This results in full compromise of the affected WordPress site and underlying server, impacting confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the affected plugin, disable or remove it if possible, and monitor for suspicious activity related to authentication and plugin uploads. Avoid using the vulnerable versions of the Pie Register plugin.
CVE-2025-34077: CWE-434 Unrestricted Upload of File with Dangerous Type in Genetech Solutions WordPress Pie Register Plugin
Description
An authentication bypass vulnerability exists in the WordPress Pie Register plugin ≤ 3.7.1.4 that allows unauthenticated attackers to impersonate arbitrary users by submitting a crafted POST request to the login endpoint. By setting social_site=true and manipulating the user_id_social_site parameter, an attacker can generate a valid WordPress session cookie for any user ID, including administrators. Once authenticated, the attacker may exploit plugin upload functionality to install a malicious plugin containing arbitrary PHP code, resulting in remote code execution on the underlying server.
CVSS v4.0
Score 10.0critical
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in the WordPress Pie Register plugin (≤ 3.7.1.4) enables unauthenticated attackers to bypass authentication by submitting a specially crafted POST request to the login endpoint with social_site=true and a manipulated user_id_social_site parameter. This allows the attacker to generate a valid session cookie for any user ID, including administrators. Subsequently, the attacker can exploit the plugin's upload functionality to install a malicious plugin with arbitrary PHP code, leading to remote code execution on the underlying server. The issue involves CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-306 (Authentication Bypass), and CWE-94 (Improper Control of Generation of Code). The CVSS 4.0 base score is 10.0, indicating critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows unauthenticated attackers to impersonate any user, including administrators, and execute arbitrary PHP code on the server by uploading malicious plugins. This results in full compromise of the affected WordPress site and underlying server, impacting confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the affected plugin, disable or remove it if possible, and monitor for suspicious activity related to authentication and plugin uploads. Avoid using the vulnerable versions of the Pie Register plugin.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2025-04-15T19:15:22.550Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 686dc4ce6f40f0eb72fd1875
Added to database: 07/09/2025, 01:24:30 UTC
Last enriched: 05/21/2026, 12:05:45 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 304
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