Vulnerability · Published Jul 21, 2025 · Assigned by ExtremeNetworks
CVE-2025-6235ExtremeControl (NAC) 'onmouseover' XSS
Medium 5.3
In plain English
A medium-severity cross-site scripting in ExtremeControl from Extreme Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Official description
In ExtremeControl before 25.5.12, a cross-site scripting (XSS) vulnerability was discovered in a login interface of the affected application. The issue stems from improper handling of user-supplied input within HTML attributes, allowing an attacker to inject script code that may execute in a user's browser under specific interaction conditions. Successful exploitation could lead to exposure of user data or unauthorized actions within the browser context.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Extreme Networks | ExtremeControl | 25.2.12 – before 25.5.11 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:L