CVE-2019-13478: The Yoast SEO plugin before 11.6-RC5 for WordPress does not properly restrict unfiltered HTML in term descriptions.

critical Affects yoast-seo (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published 2019-07-09; advisory modified 2026-06-17.

The Yoast SEO plugin before 11.6-RC5 for WordPress does not properly restrict unfiltered HTML in term descriptions.

Package: yoast-seo (WordPress plugin) WordPress
Affected versions: <11.6 or =11.6
Fixed in: no fix recorded
Severity: critical CVSS 9.8
Exploitation: not on CISA KEV · EPSS 3% (88.5th percentile)
Published: 2019-07-09
Source: nvd

References

CWE-79

NVD record yoast-seo (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.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs How findings are ranked

Related advisories

CVE-2021-25118 medium The Yoast SEO WordPress plugin (from versions 16.7 until 17.2) discloses the full internal same package: yoast-seo (WordPress plugin)
CVE-2020-11023 KEV medium Potential XSS vulnerability in jQuery same weakness: CWE-79
CVE-2019-9978 KEV medium The social-warfare plugin before 3.5.3 for WordPress has stored XSS via the wp-admin/admin same weakness: CWE-79
CVE-2020-11022 medium Potential XSS vulnerability in jQuery same weakness: CWE-79
CVE-2022-3562 medium Cross-site Scripting in librenms/librenms same weakness: CWE-79
CVE-2022-4067 medium Cross-site Scripting in librenms/librenms same weakness: CWE-79