What is CVE-2025-6703?

CVE-2025-6703 is a medium-severity vulnerability in Mozilla Neqo, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2025-06-26.

How severe is CVE-2025-6703?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Mozilla Neqo

CVE-2025-6703

Improper Input Validation vulnerability in Mozilla neqo leads to an unexploitable crash..This issue affects neqo: from 0.4.24 through 0.13.2.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.002 (11.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Mozilla Neqo — versions 0.4.24

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

security@mozilla.org (Vendor Advisory)

Frequently asked questions

What is CVE-2025-6703?: CVE-2025-6703 is a medium-severity vulnerability in Mozilla Neqo, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2025-06-26.
How severe is CVE-2025-6703?: Medium severity. CVSS v3 base score is 6.5 out of 10.