CVE-2021-3645CWE-1321

Prototype Pollution in viking04/merge

Medium · published September 10, 2021

CVSS v3.0
6.8
EPSS
1%
Percentile
72.8
In the wild
Unconfirmed
What it is

⚠️ A crafty bit of prototype pollution lurks in the merge package! An attacker could tamper with object prototypes, leading to some sneaky behavior. 🔍 Think of it like a restaurant that allows customers to alter the menu. If a diner swaps out the chef's special for something bizarre, it can spoil the entire meal—just like how this vulnerability can affect the integrity of your application! If exploited, this vulnerability could allow an attacker to modify core properties of objects, potentially leading to unexpected behaviors and security risks throughout your application. While it’s not currently exploited in the wild, the consequences could still be frustrating for your users and developers alike.

Put simply

Think of it like a restaurant that allows customers to alter the menu. If a diner swaps out the chef's special for something bizarre, it can spoil the entire meal—just like how this vulnerability can affect the integrity of your application! The merge package is vulnerable due to improperly controlled modification of object prototype attributes, enabling attackers to introduce unexpected alterations to the existing objects in JavaScript.

What to do

If exploited, this vulnerability could allow an attacker to modify core properties of objects, potentially leading to unexpected behaviors and security risks throughout your application. While it’s not currently exploited in the wild, the consequences could still be frustrating for your users and developers alike. To mitigate this, update to version 1.2.1 or higher immediately. It's also wise to review your code for any reliance on object prototypes and apply defensive programming practices. Don't forget to regularly monitor dependencies! You've got this! Follow these steps and you'll secure your app in no time. 🛡️

The record
Technical detail
CVSS v3.0
6.8 · MEDIUM
Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.01429 · 72.8th percentile
Weakness
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Published
2021-09-10T11:04Z
EPSS history
Timeline
  • 10 SEP 11:04Z
    Prototype Pollution in viking04/merge
    cvelistv5