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[Bug reporting] XSS vulnerabilty in wp_kses_bad_protocol in wp-includes/kses.php (CVE-2019-20041)

Open seongil-wi opened this issue 4 years ago • 0 comments

Hi

I found a known XSS vulnerability in the recent version of docker101. In particular, the bug we report is a known bug by 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.

Please check this line: https://github.com/ajeetraina/docker101/blob/a149f608e889262e2205e022621bde6449054e01/advanced/security/apparmor/wordpress/html/wp-includes/kses.php#L1336

Thanks!

seongil-wi avatar Sep 11 '21 15:09 seongil-wi