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CVE-2025-3605

CriticalPublished

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

Published: May 9, 2025
Updated: Apr 8, 2026
Assigning CNA: Wordfence
Evidence observed: May 13, 2025

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

6.9%

Low · next 30 days

Percentile: 93.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2025-3605Exploit
WordPress Frontend Login and Registration Blocks Plugin <= 1.0.7 is vulnerable to Privilege Escalation
WordPress Frontend Login and Registration Blocks Plugin 1.0.7 - Privilege EscalationExploit
Md Shoriful Islam · multiple · May 13, 2025

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