CVE-2025-3605

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

The Frontend Login and Registration Blocks plugin for WordPress is vulnerable to privilege escalation via account takeover in all versions up to, and including, 1.0.7. 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

arkenon · Login, Registration and Lost Password Blocks

CVSS v3.1 WORDFENCE

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

EPSS

7.44% chance of exploitation in the next 30 days, 94th percentile

Nuclei

critical · CWE-639

Published

2025-05-09

Updated

2026-04-08

Proof-of-concept exploits (1)

• Nxploited/CVE-2025-36052★ · 2025-05-09

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-3605.yaml

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/52291

References

• CVE Record
• NVD entry