How to fix CVE-2025-21603?

During next maintenance window: Identify affected systems running MZK-DP300N firmware and apply vendor patches when convenient. Verify Content-Security-Policy and output encoding.

Is MZK-DP300N affected by CVE-2025-21603?

Organizations using MZK-DP300N firmware should be aware of moderate risk from CVE-2025-21603, a cross-site scripting vulnerability rated CVSS 4.8. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

MZK-DP300N CVE-2025-21603

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-01-08 [email protected]

XSS

4.8

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:02 vuln.today

CVE Published

Jan 08, 2025 - 04:15 nvd

MEDIUM 4.8

DescriptionNVD

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.

AnalysisAI

Cross-site scripting vulnerability exists in MZK-DP300N firmware versions 1.05 and earlier. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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 ProductsAI

See vendor advisory for affected versions.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

CVE-2025-21603 vulnerability details – vuln.today

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