Cyber Resilience

CVE-2025-3605

Critical

Published: 09 May 2025

Published
09 May 2025
Modified
15 April 2026
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.1273 94.2th percentile
Risk Priority 27 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-3605 is a critical-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Wordpress (inferred from references). Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 5.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis

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. The flaw stems from missing identity validation in the flr_blocks_user_settings_handle_ajax_callback() function, which permits unauthenticated modification of user details such as email addresses.

Unauthenticated attackers can exploit the issue over the network to alter the email address of any account, including administrator accounts, and then trigger a password reset to obtain full access. The vulnerability carries a CVSS 3.1 score of 9.8 and is associated with CWE-639.

The EPSS probability reached a peak of 0.1955 after disclosure before settling at the current value of 0.1273, indicating that exploitation interest emerged following public release of the CVE. No further details on patch availability or specific mitigation steps are provided in the supplied references.

EU & UK References

Vulnerability details

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…

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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.

CWE(s)
CWE-639

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

Wordpress
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

References