CVE-2025-69234CWE-358

CVE-2025-69234

Critical · published December 30, 2025

CVSS v3.1
9.1
EPSS
0%
Percentile
20.5
In the wild
Unconfirmed
What it is

🔥 An iframe escape in Whale browser means attackers could slip right out of the sandbox! Imagine a super sneaky magician who disappears from their box — that's how elusive this vulnerability is! Think of the iframe as a magician's box, designed to keep them contained. But if the box has a faulty latch, like this vulnerability, the magician can escape and wreak havoc outside, doing whatever they please! Any attacker could exploit this flaw to run arbitrary code, undermining the entire browser environment. Imagine the chaos when they can access sensitive data or manipulate user sessions at will! This could lead to severe data breaches and compromise user trust.

Put simply

Think of the iframe as a magician's box, designed to keep them contained. But if the box has a faulty latch, like this vulnerability, the magician can escape and wreak havoc outside, doing whatever they please! This vulnerability allows an attacker to escape the iframe sandbox in versions of Whale browser before 4.35.351.12, giving them the ability to execute malicious code outside of the intended sandbox environment.

What to do

Any attacker could exploit this flaw to run arbitrary code, undermining the entire browser environment. Imagine the chaos when they can access sensitive data or manipulate user sessions at will! This could lead to severe data breaches and compromise user trust. Update Whale browser to version 4.35.351.12 or later immediately to close this critical vulnerability. Ensure that any security policies in place are reviewed and tightened to prevent such incursions. You've got this! With a quick update, you'll reinforce your defenses and keep the internet safe! 🛡️

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00291 · 20.5th percentile
Weakness
CWE-358 · Improperly Implemented Security Check for Standard
Published
2025-12-30T07:16Z
Affected products (1)
ProductVersionsFixed in
navercorp/whale< 4.35.351.124.35.351.12
References (1)
EPSS history
Timeline
  • 30 DEC 01:18Z
    Whale browser before 4.35.351.12 allows an attacker to escape the iframe sandbox in a sidebar environment
    cvelistv5