UpHeron
All vulnerabilities

WordPress core

CVE-2019-20041

wp_kses_bad_protocol in wp-includes/kses.php in WordPress before 5.3.1 mishandles the HTML5 colon named entity, allowing attackers to bypass input sanitization, as demonstrated by the javascript: substring.

Severity
Critical 9.8
Published
27 Dec 2019
Last changed
17 Jun 2026
Added to UpHeron
17 Oct 2026
Fixed in
5.3.1
Sources
NVD

Affected software

SoftwareAffected versions
WordPressWordPress core · cpe:a:wordpress:wordpress
  • Every version before 5.3.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-20041
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-20041