CVE-2021-44120

SPIP 4.0.0 is affected by a Cross Site Scripting (XSS) vulnerability in
ecrire/public/interfaces.php, adding the function safehtml to the
vulnerable fields. An editor is able to modify his personal information. If
the editor has an article written and available, when a user goes to the
public site and wants to read the author’s information, the malicious code
will be executed. The “Who are you” and “Website Name” fields are
vulnerable.