CVE-2021-23558 Prototype Pollution

High 7.3 Published 28 Jan 2022 Updated 16 Sep 2024

Prototype pollution in bmoor allows attackers to modify object prototypes, potentially leading to code execution or privilege escalation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2021-23558?

CVE-2021-23558 is a high-severity vulnerability in n/a, published on 28 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The package bmoor before 0.10.1 are vulnerable to Prototype Pollution due to missing sanitization in set function. **Note:** This vulnerability derives from an incomplete fix in [CVE-2020-7736](https://security.snyk.io/vuln/SNYK-JS-BMOOR-598664)

Weakness: CWE-1321

Which versions are affected by CVE-2021-23558?

2 open source packages ship an affected version, including bmoor. It affects 1 product.

Package	Affected	Fixed in
`bmoor` npm	All versions	`0.10.1`
`bmoor` npm	All versions	`0.10.1`

Products include Bmoor Project Bmoor.

How do I fix CVE-2021-23558?

Upgrade bmoor to 0.10.1 or later.

Is CVE-2021-23558 being exploited?

There is no known exploitation of CVE-2021-23558 in the wild and no public exploit code.

CVE-2020-7736 Prototype Pollution High 7.3

Sources

Also known as GHSA-4m8h-h59m-m34j, SNYK-JS-BMOOR-2342622.