What’s Vulnerable › Vulnerabilities

CVE-2019-16222

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-09-11 · updated 2026-06-17
• Weakness: CWE-79

Description

WordPress before 5.2.3 has an issue with URL sanitization in wp_kses_bad_protocol_once in wp-includes/kses.php that can lead to cross-site scripting (XSS) attacks.

Affected products

• Debian Linux: 8.0, 9.0, 10.0
• WordPress: before 5.2.3 — fixed in 5.2.3

How to fix

Upgrade to a fixed version: WordPress 5.2.3. Check the vendor advisory for mitigations.

References

• https://core.trac.wordpress.org/changeset/45997
• https://github.com/WordPress/WordPress/commit/30ac67579559fe42251b5a9f887211bf61a8ed68
• https://lists.debian.org/debian-lts-announce/2019/10/msg00023.html
• https://seclists.org/bugtraq/2020/Jan/8
• https://wordpress.org/news/2019/09/wordpress-5-2-3-security-and-maintenance-release/
• https://wpvulndb.com/vulnerabilities/9867
• https://www.debian.org/security/2020/dsa-4599
• https://www.debian.org/security/2020/dsa-4677
• https://core.trac.wordpress.org/changeset/45997
• https://github.com/WordPress/WordPress/commit/30ac67579559fe42251b5a9f887211bf61a8ed68
• https://lists.debian.org/debian-lts-announce/2019/10/msg00023.html
• https://seclists.org/bugtraq/2020/Jan/8

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