Adobe Connect XSS Flaw: Critical Remote Code Execution Risk

The National Vulnerability Database has issued an alert regarding CVE-2026-27243, a critical reflected Cross-Site Scripting (XSS) vulnerability impacting Adobe Connect versions 2025.3, 12.10, and earlier. This isn’t just a minor glitch; with a CVSS score of 9.3, it’s firmly in the ‘CRITICAL’ category, demanding immediate attention from anyone running these platforms.

According to the National Vulnerability Database, an attacker could exploit this flaw by tricking a victim into clicking a specially crafted URL. If successful, malicious JavaScript would execute within the victim’s browser context. This kind of XSS isn’t just about defacement; it can lead to session hijacking, credential theft, or even arbitrary code execution, depending on the victim’s privileges and the attacker’s creativity. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N highlights the network attack vector, low attack complexity, and high impact on confidentiality and integrity, with user interaction being the only mitigating factor.