Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wordpress | Wordpress | < 5.3.1 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://github.com/WordPress/wordpress-develop/commit/b1975463dd995da19bb40d3fa0Patch
- https://lists.debian.org/debian-lts-announce/2020/01/msg00010.htmlMailing ListThird Party Advisory
- https://seclists.org/bugtraq/2020/Jan/8Mailing ListThird Party Advisory
- https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-releRelease NotesVendor Advisory
- https://www.debian.org/security/2020/dsa-4599Third Party Advisory
- https://www.debian.org/security/2020/dsa-4677Third Party Advisory
- https://github.com/WordPress/wordpress-develop/commit/b1975463dd995da19bb40d3fa0Patch
- https://lists.debian.org/debian-lts-announce/2020/01/msg00010.htmlMailing ListThird Party Advisory
- https://seclists.org/bugtraq/2020/Jan/8Mailing ListThird Party Advisory
- https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-releRelease NotesVendor Advisory
- https://www.debian.org/security/2020/dsa-4599Third Party Advisory
- https://www.debian.org/security/2020/dsa-4677Third Party Advisory
FAQ
What is CVE-2019-20041?
CVE-2019-20041 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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&colon...
How severe is CVE-2019-20041?
CVE-2019-20041 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2019-20041?
Check the references section above for vendor advisories and patch information. Affected products include: Wordpress Wordpress, Debian Debian Linux.