CVE-2025-3605 PoC — Frontend Login and Registration Blocks <= 1.1.1 - Unauthenticated Privilege Escalation via Account Takeover

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-3605.yaml

Associated Vulnerability

Title: Frontend Login and Registration Blocks <= 1.1.1 - Unauthenticated Privilege Escalation via Account Takeover (CVE-2025-3605)
Description:The Frontend Login and Registration Blocks plugin for WordPress is vulnerable to privilege escalation via account takeover in all versions up to, and including, 1.1.1. This is due to the plugin not properly validating a user's identity prior to updating their details like email via the flr_blocks_user_settings_handle_ajax_callback() function. This makes it possible for unauthenticated attackers to change arbitrary user's email addresses, including administrators, and leverage that to reset the user's password and gain access to their account.

Description

Privilege escalation vulnerability exists in the Frontend Login and Registration Blocks plugin for WordPress (versions <= 1.0.7). An unauthenticated attacker can exploit the AJAX endpoint flr_blocks_user_settings_handle_ajax_callback() to change the administrator's email address. Subsequently, the attacker can use the "Forgot Password" feature to reset the administrator's password, thereby gaining unauthorized access to the admin account.

File Snapshot

Remarks

1. It is advised to access via the original source first.

2. Local POC snapshots are reserved for subscribers — if the original source is unavailable, the local mirror is part of the paid plan.

View subscription plans →