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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release/ ↗
- https://github.com/WordPress/wordpress-develop/commit/b1975463dd995da19bb40d3fa0786498717e3c53 ↗
- https://seclists.org/bugtraq/2020/Jan/8 ↗
- https://www.debian.org/security/2020/dsa-4599 ↗
- https://lists.debian.org/debian-lts-announce/2020/01/msg00010.html ↗
- https://www.debian.org/security/2020/dsa-4677 ↗