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.

Score

CVSS 3.1 9.8 Critical

Status

Modified - cve@mitre.org

Published

2019-12-27

Last modified

2024-08-05

Weaknesses

CWE-20

Affected products

• Debian Linux (Debian)
• Wordpress (Wordpress)

References

• https://github.com/WordPress/wordpress-develop/commit/b1975463dd995da19bb40d3fa0786498717e3c53
• https://lists.debian.org/debian-lts-announce/2020/01/msg00010.html
• https://seclists.org/bugtraq/2020/Jan/8
• https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release/
• https://www.debian.org/security/2020/dsa-4599
• https://www.debian.org/security/2020/dsa-4677