CVE-2025-3605criticalobserved exploitationCWE-639

CVE-2025-3605: critical vulnerability in arkenon Login, Registration and Lost Password…

Frontend Login and Registration Blocks <= 1.1.1 - Unauthenticated Privilege Escalation via Account Takeover

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85Vexday Risk Score

Patch now. It exploitation observed by VulnCheck and has a working public exploit.

ssvc Actcvss 9.8epss 7.8%
from disclosure to weaponsame day
Published on NVDMay 9
1st PoCMay 9
VulnCheck+147d
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
arkenon · Login, Registration and Lost Password Blocks
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CVE-2025-3607HIGHFrontend Login and Registration Blocks <= 1.0.8 - Authenticated (Subscriber+) Privilege Escalation via Password ResetEPSS 0.5%