Vulnerability · Published May 9, 2025 · Assigned by Wordfence
CVE-2025-3605Frontend Login and Registration Blocks <= 1.1.1 - Unauthenticated Privilege Escalation via Account Takeover
Critical 9.8
In plain English
A critical-severity authorization bypass via user-controlled key in Login, Registration and Lost Password Blocks from arkenon. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 7.7% (higher than 95% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code.
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| arkenon | Login, Registration and Lost Password Blocks | 0 – through 1.1.1 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H