What is CVE-2025-62583?

CVE-2025-62583 is a critical-severity vulnerability in Naver Whale Browser, classified under CWE-358. CVSS score: 9.8/10. Published 2025-10-16.

How severe is CVE-2025-62583?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Naver Whale Browser

CVE-2025-62583

Whale Browser before 4.33.325.17 allows an attacker to escape the iframe sandbox in a dual-tab environment.

Published 2025-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (40.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Naver Whale Browser — versions 4.33.325.17
Navercorp Whale

Weakness classification (CWE)

CWE-358

References

cve.naver.com/detail/cve-2025-62583.html (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-62583?: CVE-2025-62583 is a critical-severity vulnerability in Naver Whale Browser, classified under CWE-358. CVSS score: 9.8/10. Published 2025-10-16.
How severe is CVE-2025-62583?: Critical severity. CVSS v3 base score is 9.8 out of 10.