Adobe Connect version 11.2.2 (and earlier) is affected by a Reflected Cross-site Scripting vulnerability that could be abused by an attacker to inject malicious scripts into vulnerable form fields. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser.
https://helpx.adobe.com/security/products/connect/apsb21-66.html