What is the CVSS score of CVE-2025-3605?

CVE-2025-3605 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 12.7%.

Which versions of WordPress are affected by CVE-2025-3605?

Organizations using Frontend Login and Registration Blocks face critical risk from CVE-2025-3605, a IDOR vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2025-3605?

Yes, a public proof-of-concept exploit is available for CVE-2025-3605. Prioritise patching immediately. EPSS: 12.7%.

How to fix or mitigate CVE-2025-3605?

Within 24 hours: Identify all affected systems running and Registration Blocks plugin for WordPress is vulnerable t and apply vendor patches immediately. Monitor vendor channels for patch availability.

WordPress CVE-2025-3605

CRITICAL

Authorization Bypass Through User-Controlled Key (CWE-639)

2025-05-09 security@wordfence.com

WordPress Authentication Bypass Privilege Escalation

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Apr 08, 2026 - 17:20 vuln.today

Public exploit code

Analysis Generated

Mar 28, 2026 - 18:41 vuln.today

CVE Published

May 09, 2025 - 07:16 nvd

CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

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. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 12.7%.

Technical ContextAI

This vulnerability is classified under CWE-639. 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 ProductsAI

See vendor advisory for affected versions.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.