CVE-2025-62583: NAVER Whale browser · Improperly Implemented Security Check for Standard
Affects NAVER Whale browserSource CVE Database V5
Not known to be exploited · CVSS 9.8 Critical : upgrade to 4.33.325.17 as a priority.
Data as of 26 Oct 2026, 10:12 UTC
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 16 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| NAVER NAVER Whale browser | Affected
| Fixed in
|
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.