Adobe Connect is susceptible to a critical reflected XSS vulnerability that enables attackers to execute arbitrary code in a victim's browser session through malicious URL manipulation.

This is a reflected Cross-Site Scripting (XSS) vulnerability where the application fails to properly sanitize input before reflecting it back to the user. An attacker can exploit this by crafting a URL that, when visited by a target, executes unauthorized JavaScript in the context of their session.

Reflected XSS can be leveraged to perform phishing, session hijacking, or unauthorized administrative actions. With a CVSS score of 9.3, the impact is critical, as it allows attackers to bypass security boundaries and potentially gain control over authenticated user sessions.

Immediate Action: Apply the latest security updates provided by Adobe to ensure all vulnerable endpoints are patched.

Proactive Monitoring: Monitor for anomalous traffic or URLs containing suspicious script-like parameters directed at the Adobe Connect instance.

Compensating Controls: Utilize a Web Application Firewall (WAF) to filter and block requests containing malicious payloads commonly used in XSS attacks.

Public Exploit Available: Unknown

Given the critical severity rating, organizations must treat this vulnerability as a high priority. Ensure all systems are updated to the vendor-recommended versions to mitigate the risk of malicious script injection and unauthorized access.