What’s Vulnerable › Vulnerabilities
CVE-2025-6235: ExtremeControl (NAC) 'onmouseover' XSS
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-07-21 · updated 2026-06-17
- Weakness: CWE-79
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
- Extreme Networks ExtremeControl: before 25.5.12 — fixed in 25.5.12
How to fix
Upgrade to a fixed version: Extreme Networks ExtremeControl 25.5.12. Check the vendor advisory for mitigations.
References
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