Vulnerabilities / Defender Security / WPSEC-2026-2785
Defender Security <= 6.4.0 - Unauthenticated Two-Factor Authentication Bypass via Brute Force
High 7.4
CWE-307Fixed in 6.4.1
- ID
- WPSEC-2026-2785
- Plugin
- Defender Security – Malware Scanner, Login Security & Firewall (defender-security)
- Affected
- all versions before 6.4.1
- Remediation
- Update to 6.4.1 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness
- CWE-307
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-11-10
- Attack surface
- Defender Security on WPSec AttackSurface
- Fix released
- Published
Description
The Defender Security plugin for WordPress is vulnerable to Two-Factor Authentication Bypass via brute force in all versions up to, and including, 6.4.0, due to failed two-factor code attempts only being counted and locked out when the Login Protection feature (disabled by default) was enabled. This makes it possible for unauthenticated attackers who already know a user's password to guess the two-factor code without limit and log in as that user.
References
- https://wpsec.com/vuln/WPSEC-2026-2785/
- https://plugins.svn.wordpress.org/defender-security/tags/6.4.1/
- https://wordpress.org/plugins/defender-security/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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