CVE-2019-20041: Input Validation
First published: Fri Dec 27 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/wordpress | 5.0.15+dfsg1-0+deb10u1 5.0.19+dfsg1-0+deb10u1 5.7.8+dfsg1-0+deb11u2 6.1.1+dfsg1-1 6.3.1+dfsg1-1 | |
| WordPress WordPress | <5.3.1 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 |
Remedy
https://github.com/WordPress/wordpress-develop/commit/b1975463dd995da19bb40d3fa0786498717e3c53
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Reference Links
- https://github.com/WordPress/wordpress-develop/commit/b1975463dd995da19bb40d3fa0786498717e3c53
- https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release/
- https://security-tracker.debian.org/tracker/CVE-2019-20041
- https://lists.debian.org/debian-lts-announce/2020/01/msg00010.html
- https://seclists.org/bugtraq/2020/Jan/8
- https://www.debian.org/security/2020/dsa-4599
- https://www.debian.org/security/2020/dsa-4677
Frequently Asked Questions
What is CVE-2019-20041?
CVE-2019-20041 is a vulnerability in WordPress before 5.3.1 that allows attackers to bypass input sanitization.
What is the severity of CVE-2019-20041?
CVE-2019-20041 has a severity level of 9.8 (Critical).
How does CVE-2019-20041 affect WordPress?
CVE-2019-20041 affects WordPress versions before 5.3.1.
How can CVE-2019-20041 be exploited?
CVE-2019-20041 can be exploited by using the HTML5 colon named entity to bypass input sanitization.
How can I fix CVE-2019-20041?
To fix CVE-2019-20041, update WordPress to version 5.3.1 or later.
- collector/security-tracker-debian
- agent/type
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/author
- agent/references
- agent/severity
- agent/remedy
- agent/weakness
- agent/tags
- agent/description
- agent/event
- collector/mitre-cve
- source/MITRE
- package-manager/debian
- vendor/wordpress
- canonical/wordpress wordpress
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0
- version/debian debian linux/10.0