vulnerability

Wordpress: CVE-2019-20041: Improper Input Validation

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Severity	CVSS	Published	Added	Modified
8	(AV:N/AC:L/Au:N/C:P/I:P/A:P)	Dec 27, 2019	Jan 6, 2020	Aug 11, 2025

Severity

CVSS

(AV:N/AC:L/Au:N/C:P/I:P/A:P)

Published

Dec 27, 2019

Added

Jan 6, 2020

Modified

Aug 11, 2025

Description

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.

Solution

wordpress-upgrade-5_3_1

References

CVE-2019-20041
https://attackerkb.com/topics/CVE-2019-20041
CWE-20

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