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VulnerabilityPublished

CVE-2025-62583: NAVER Whale browser · Improperly Implemented Security Check for Standard

Affects NAVER Whale browserSource CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical : upgrade to 4.33.325.17 as a priority.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 42% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.33.325.17
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Oct 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade NAVER Whale browser to 4.33.325.17.

Affected software

ProductAffectedFixed in
NAVER NAVER Whale browserAffected
  • <4.33.325.17
Fixed in
  • 4.33.325.17

AI-suggested

2) Until patches are available, consider restricting or disabling the use of NAVER Whale browser in sensitive environments or replacing it with browsers that do not exhibit this vulnerability. 3) Implement strict Content Security Policies (CSP) to limit the capabilities of iframes and reduce the risk of sandbox escape. 4) Employ browser isolation technologies or sandboxing at the OS or network level to contain potential exploitation. 5) Educate users about the risks of visiting untrusted websites, especially when using vulnerable browser versions. 6) Monitor network and endpoint logs for unusual cross-tab or iframe-related activity that could indicate exploitation attempts. 7) Use web application firewalls (WAFs) to detect and block malicious payloads targeting browser vulnerabilities. These measures go beyond generic advice by focusing on interim protective controls and proactive monitoring until official patches are deployed.

Description

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

References

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