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CVE-2016-1564: Multiple cross-site scripting (XSS) vulnerabilities in wp-includes/class-wp-theme.php in WordPress before 4.4.1 allow remote attackers to inject arbitrary web script or HTML via a (1) stylesheet name

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

Multiple cross-site scripting (XSS) vulnerabilities in wp-includes/class-wp-theme.php in WordPress before 4.4.1 allow remote attackers to inject arbitrary web script or HTML via a (1) stylesheet name

Package
WordPress core WordPress
Affected versions
<=4.4.0
Fixed in
no fix recorded
Severity
medium  CVSS 6.1
Exploitation
not on CISA KEV · EPSS 3% (87.0th percentile)
Published
2016-05-22
Source
nvd

References

CWE-79
NVD recordWordPress core advisories

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# 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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