How severe is CVE-2025-21603?

CVE-2025-21603 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-21603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21603?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-21603 have an EU (EUVD) identifier?

Yes. CVE-2025-21603 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2568.

When was CVE-2025-21603 published?

CVE-2025-21603 was published on 2025-01-08 and last updated on 2026-06-17.

CVE-2025-21603

CVE-2025-21603 is a medium-severity vulnerability with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2568
Weakness: CWE-79
Published: 2025-01-08
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-21603?: 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.
How severe is CVE-2025-21603?: CVE-2025-21603 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-21603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-21603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-21603 have an EU (EUVD) identifier?: Yes. CVE-2025-21603 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2568.
When was CVE-2025-21603 published?: CVE-2025-21603 was published on 2025-01-08 and last updated on 2026-06-17.

References

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

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →