CVE-2025-3605 Frontend Login and Registration Blocks <= 1.1.1 - Unauthenticated Privilege Escalation via Account Takeover
Unauthenticated attackers can change arbitrary user emails to reset passwords and take over accounts, including administrators, due to missing identity validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-3605?
CVE-2025-3605 is a critical authentication bypass vulnerability in arkenon Login, Registration and Lost Password Blocks, published on 9 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-639
Which versions are affected by CVE-2025-3605?
How do I fix CVE-2025-3605?
No fix has been published for CVE-2025-3605 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-3605 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3605 exists.
Public exploit code: 1 Exploit-DB entry, 1 Nuclei template and 1 proofs of concept on GitHub.
Sources
Also known as GHSA-q43x-gh6j-72hr.