CVE-2021-4425: 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_l

medium Affects defender-security (WordPress plugin). Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

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_l

Package
defender-security (WordPress plugin) WordPress
Affected versions
<=2.4.6
Fixed in
no fix recorded
Severity
medium  CVSS 4.3
Exploitation
not on CISA KEV · EPSS 1% (46.7th percentile)
Published
2023-07-12
Source
nvd

References

CWE-352
NVD recorddefender-security (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden wordpress /var/www/html

# or, without Composer
pipx install phpwarden   &&   phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

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