CVE-2025-53599CWE-79

Whale browser for iOS before 3.9.1.4206 allow an attacker to execute malicious scripts in the browser via a crafted javascript scheme

Critical · published July 4, 2025

CVSS v3.1
9.8
EPSS
0%
Percentile
37.3
In the wild
Unconfirmed
What it is

🔥 A simple crafted JavaScript scheme can unleash chaos on Whale browser for iOS before version 3.9.1.4206! Think of this like a sneaky chef who gets into a restaurant kitchen and starts adding mystery ingredients to every dish — without anyone checking the recipe. Just like that chef, an attacker can execute their own scripts in users' browsers. This could lead to disastrous consequences, such as stealing sensitive personal information, redirecting users to malicious websites, or even taking control of their browser sessions. It's absolutely devastating if an attacker can play puppeteer with someone's browsing experience!

Put simply

Think of this like a sneaky chef who gets into a restaurant kitchen and starts adding mystery ingredients to every dish — without anyone checking the recipe. Just like that chef, an attacker can execute their own scripts in users' browsers. This vulnerability allows attackers to execute arbitrary scripts by exploiting a crafted JavaScript scheme within the Whale browser, effectively bypassing security measures intended to protect users.

What to do

This could lead to disastrous consequences, such as stealing sensitive personal information, redirecting users to malicious websites, or even taking control of their browser sessions. It's absolutely devastating if an attacker can play puppeteer with someone's browsing experience! Update Whale browser to version 3.9.1.4206 or higher immediately to close this critical vulnerability. Ensure that all users are informed to prevent any potential exploitation while patching. Additionally, review security policies to reinforce safe browsing habits. You've got this! By taking these steps, you're on your way to keeping your browsing experience safe and sound! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00442 · 37.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2025-07-04T07:20Z
EPSS history
Timeline
  • 04 JUL 07:20Z
    Whale browser for iOS before 3.9.1.4206 allow an attacker to execute malicious scripts in the browser via a crafted javascript scheme
    cvelistv5