Understanding and Defending Against Stored Cross-Site Scripting (XSS) in AVideo TopMenu Plugin
This educational analysis covers CVE-2026-56347, a stored cross-site scripting vulnerability in the AVideo TopMenu plugin through version 26.0. The vulnerability allows attackers to inject malicious JavaScript through unescaped menu item fields, potentially stealing session cookies or performing unauthorized actions on all site visitors. We will delve into the root cause, attack surface, exploitation mechanics, real-world impact, and defensive strategies.