CVE-2025-21603: Planex Communications Inc Mzk-DP300N

Medium severity, CVSS 4.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Cross-site scripting vulnerability exists in MZK-DP300N firmware versions 1.05 and earlier. If an attacker logs in to the affected product and manipulates the device settings, an arbitrary script may be executed on the logged-in user's web browser when accessing a crafted URL.

Affected products

• Planex Communications Inc Mzk-DP300N: up to and including 1.05

Published 2025-01-08. Last modified 2026-06-17.