The Defender Security plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.4.6. This is due to missing or incorrect nonce validation on the verify_otp_login_time() function. This makes it possible for unauthenticated attackers to verify a one time login via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
CVE-2021-4425 is a medium severity with CVSS 4.3 Cross-Site Request Forgery issue affecting the Plugin Defender Security – Malware Scanner, Login Security & Firewall. It affects Versions up to 2.4.6 and is fixed in 2.4.6.1.
CVE-2021-4425 is tracked for the Plugin Defender Security – Malware Scanner, Login Security & Firewall as medium severity with CVSS 4.3. The affected range is Versions up to 2.4.6. Update Defender Security – Malware Scanner, Login Security & Firewall to 2.4.6.1 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
defender-security
View on wordpress.org
|
| CVE | CVE-2021-4425 |
| Patched Versions |
2.4.6.1
|
| Affected Versions |
Versions up to 2.4.6
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Defender Security <= 3.3.2 - Sensitive Information Disclosure
Defender Security <= 4.4.1 - IP Address Spoofing
Defender Security <= 4.7.2 - Missing Authorization
Defender Security <= 4.1.0 - Sensitive Information Exposure via Log File
Defender Security <= 4.2.0 - Masked Login Area Security Feature Bypass
Defender Security <= 4.0.2 - Hide Login Page Feature Protection Bypass
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