Description
CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A vulnerability has been discovered in the core HTML processing module and may affect all plugins used by CKEditor 4 prior to version 4.18.0. The vulnerability allows someone to inject malformed HTML bypassing content sanitization, which could result in executing JavaScript code. This problem has been patched in version 4.18.0. There are currently no known workarounds.
Remediation
References
Related Vulnerabilities
Moodle Uncontrolled Resource Consumption Vulnerability (CVE-2021-32476)
WordPress Plugin Stripe Payment for WooCommerce Security Bypass (3.7.7)
phpList Access of Resource Using Incompatible Type ('Type Confusion') Vulnerability (CVE-2020-8547)
Squid Improper Resource Locking Vulnerability (CVE-2026-32748)