CVE-2023-4402: The Essential Blocks plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 4.2.0 via deserialization of untrusted input in the get_products function. This allows

high Affects essential-blocks (WordPress plugin), essential-blocks-pro (WordPress plugin). Feed 2026.10.29.3, updated 2026-10-29; published 2023-10-20; advisory modified 2026-06-17.

The Essential Blocks plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 4.2.0 via deserialization of untrusted input in the get_products function. This allows

Package: essential-blocks (WordPress plugin) WordPress
Affected versions: <4.2.1
Fixed in: 4.2.1
Severity: high CVSS 8.1
Exploitation: not on CISA KEV · EPSS 1% (73.5th percentile)
Published: 2023-10-20
Source: nvd

References

The Essential Blocks plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 4.2.0 via deserialization of untrusted input in the get_products function. This allows

Package: essential-blocks-pro (WordPress plugin) WordPress
Affected versions: <1.1.1
Fixed in: 1.1.1
Severity: high CVSS 8.1
Exploitation: not on CISA KEV · EPSS 1% (73.5th percentile)
Published: 2023-10-20
Source: nvd

References

CWE-502

NVD record essential-blocks (WordPress plugin) advisories essential-blocks-pro (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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