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CVE-2018-6389: In WordPress through 4.9.2, unauthenticated attackers can cause a denial of service (resource consumption) by using the large list of registered .js files (from wp-includes/script-loader.php) to const

high Affects WordPress core. Feed 2026.10.29.3, updated 2026-10-29; published ; advisory modified .

In WordPress through 4.9.2, unauthenticated attackers can cause a denial of service (resource consumption) by using the large list of registered .js files (from wp-includes/script-loader.php) to const

Package
WordPress core WordPress
Affected versions
<=4.9.2
Fixed in
no fix recorded
Severity
high  CVSS 7.5
Exploitation
not on CISA KEV · EPSS 73% (99.4th percentile)
Published
2018-02-06
Source
nvd

References

CWE-400
NVD recordWordPress core 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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