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CVE-2014-5240: Cross-site scripting (XSS) vulnerability in wp-includes/pluggable.php in WordPress before 3.9.2, when Multisite is enabled, allows remote authenticated administrators to inject arbitrary web script or

low Affects WordPress core. Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

Cross-site scripting (XSS) vulnerability in wp-includes/pluggable.php in WordPress before 3.9.2, when Multisite is enabled, allows remote authenticated administrators to inject arbitrary web script or

Package
WordPress core WordPress
Affected versions
<=3.9.1 or =3.0 or =3.0.1 or =3.0.2 or =3.0.3 or =3.0.4 or =3.0.5 or =3.0.6 or =3.1 or =3.1.1 or =3.1.2 or =3.1.3 or =3.1.4 or =3.2 or =3.2.1 or =3.3 or =3.3.1 or =3.3.2 or =3.3.3 or =3.4.0 or =3.4.1 or =3.4.2 or =3.5.0 or =3.5.1 or =3.6 or =3.6.1 or =3.7 or =3.7.1 or =3.8 or =3.8.1 or =3.9.0
Fixed in
no fix recorded
Severity
low  CVSS 2.1
Exploitation
not on CISA KEV · EPSS 2% (82.4th percentile)
Published
2014-08-18
Source
nvd

References

CWE-79
NVD recordWordPress core 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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