What is CVE-2025-53599?

CVE-2025-53599 is a critical-severity vulnerability in Naver Whale Browser, classified under Cross-site Scripting. CVSS score: 9.8/10. Published 2025-07-04.

How severe is CVE-2025-53599?

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

XSS in Naver Whale Browser

CVE-2025-53599

Whale browser for iOS before 3.9.1.4206 allow an attacker to execute malicious scripts in the browser via a crafted javascript scheme.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (29.5th percentile) — read the EPSS interpretation.

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.

Affected products

Naver Whale Browser — versions 3.9.1.4206
Navercorp Whale

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@navercorp.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-53599?: CVE-2025-53599 is a critical-severity vulnerability in Naver Whale Browser, classified under Cross-site Scripting. CVSS score: 9.8/10. Published 2025-07-04.
How severe is CVE-2025-53599?: Critical severity. CVSS v3 base score is 9.8 out of 10.