CVE-2025-53600Network attack vector

Same-Origin Policy bypass via dual-tab validation failure

Published Jul 4, 2025 · Updated Jul 8, 2025

Origin validation error in NAVER Whale Browser before 4.32.315.22 allows remote attackers to bypass the Same-Origin Policy. In the vendor-described dual-tab environment, Whale accepts cross-origin interaction that its origin check should reject. The dual-tab condition is required, and the vendor has not published the responsible component, request flow, or finer exploit details.

CVSS severity7.5
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Origin validation error in NAVER Whale Browser before 4.32.315.22 allows remote attackers to bypass the Same-Origin Policy. In the vendor-described dual-tab environment, Whale accepts cross-origin interaction that its origin check should reject. The dual-tab condition is required, and the vendor has not published the responsible component, request flow, or finer exploit details.

The record

CVE
CVE-2025-53600
Published
Jul 4, 2025
Updated
Jul 8, 2025
Vendor
NAVER Corporation
Product
NAVER Whale Browser
Classifications
CWE-346
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NAVER Corporation · NAVER Whale BrowserAffected versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo