CVE-2023-42399

In Jodit Editor prior to version 4.13.6, the clean-html denyTags filter does not normalize foreign SVG or MathML script node names, allowing a script element to remain in editor.value and execute when content is loaded.

In Jodit Editor prior to version 4.12.31, the sanitizeHTMLElement method fails to use isDangerousUrl to normalize javascript: href values before checking the scheme, allowing case variants, control-byte prefixes, and embedded tabs or newlines to bypass filtering. A victim clicking a stored link can execute attacker-controlled script.

Jodit Editor versions before 4.12.28 contain an XSS vulnerability due to bypass of the clean-html sanitizer. An attacker can use MathML or <style> as a carrier to hide a dangerous element from the sanitizer, allowing onload or onfocus events to be placed in the editor. When the application renders the editor content, JavaScript code executes without user interaction.

Jodit Editor versions prior to 4.12.26 are vulnerable to Prototype Pollution via the Jodit.modules.Helpers.set() function. An attacker can pass a crafted key chain containing __proto__, constructor, or prototype, leading to Object.prototype modification and injection of unexpected properties.

In Jodit Editor prior to version 4.12.18, the Jodit.configure() function and internal ConfigMerge/ConfigProto helpers merged user-supplied options without filtering prototype-mutating keys, leading to a Prototype Pollution vulnerability.