CVE-2025-62583Network attack vector

Iframe sandbox escape via dual-tab handling

Published Oct 16, 2025 · Updated Oct 16, 2025

Sandbox escape in NAVER Whale Browser before 4.33.325.17 allows attackers to bypass iframe restrictions in a dual-tab environment. The flaw is in Whale's dual-tab handling of sandboxed iframes, but NAVER has not disclosed the specific check or operation that fails. Exploitation requires a sandboxed iframe in a dual-tab context; the published record does not identify post-escape capabilities beyond bypassing iframe sandbox restrictions.

CVSS severity9.8
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in NAVER Whale Browser before 4.33.325.17 allows attackers to bypass iframe restrictions in a dual-tab environment. The flaw is in Whale's dual-tab handling of sandboxed iframes, but NAVER has not disclosed the specific check or operation that fails. Exploitation requires a sandboxed iframe in a dual-tab context; the published record does not identify post-escape capabilities beyond bypassing iframe sandbox restrictions.

The record

CVE
CVE-2025-62583
Published
Oct 16, 2025
Updated
Oct 16, 2025
Vendor
NAVER Corporation
Product
NAVER Whale Browser
Classifications
CWE-358
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 16, 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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-358Improperly Implemented Security Check for Standard

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

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Your stack

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