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CVE-2018-20156: The WP Maintenance Mode plugin before 2.0.7 for WordPress allows remote authenticated "site administrator" users to execute arbitrary PHP code throughout a multisite network.

high Affects wp-maintenance-mode (WordPress plugin). Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

The WP Maintenance Mode plugin before 2.0.7 for WordPress allows remote authenticated "site administrator" users to execute arbitrary PHP code throughout a multisite network.

Package
wp-maintenance-mode (WordPress plugin) WordPress
Affected versions
<2.0.7
Fixed in
2.0.7
Severity
high  CVSS 7.2
Exploitation
not on CISA KEV · EPSS 2% (74.3th percentile)
Published
2018-12-14
Source
nvd

References

CWE-20
NVD recordwp-maintenance-mode (WordPress plugin) advisories

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# 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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