---
title: "Log4J Vulnerability ‘Log4Shell’ Resource Center | FOSSA"
description: "Access resources to help your organization detect, remove, and upgrade vulnerable versions of Log4J."
canonical_url: "https://fossa.com/log4j-vulnerability-log4shell/"
markdown_url: "https://fossa.com/log4j-vulnerability-log4shell.md"
content_type: "educational"
language: "en"
date_published: "2025-03-15"
date_modified: "2025-03-15"
author: "FOSSA"
organization: "FOSSA"
---

# Log4J Vulnerability ‘Log4Shell’ Resource Center | FOSSA

> Access resources to help your organization detect, remove, and upgrade vulnerable versions of Log4J.

## Log4J Vulnerability “Log4Shell” Resource Center

Apache Log4J, the popular java open source logging library, was plagued by a series of vulnerabilities over the course of several weeks in December 2021. The most serious was CVE-2021-44228, a remote code execution vulnerability with a CVSS score of 10, the maximum severity rating possible.

On this page, you’ll find resources from FOSSA’s security engineering team to help your organization detect, remove, and upgrade vulnerable versions of Log4J.

### Resources

#### [How to Implement the CSRB’s Log4j Security Recommendations](https://fossa.com/blog/how-implement-csrbs-log4j-security-recommendations.md)

**BLOG POST**

Learn More

#### [Using SBOMs for Security](https://gateway.on24.com/wcc/eh/4613607/lp/4641169/the-dos-and-donts-of-using-sboms-for-security?utm_source=fossa&utm_medium=log4j)

**ON-DEMAND WEBINAR**

Watch Now

#### [How to Quickly Find and Fix Log4j Vulnerabilities with FOSSA](https://fossa.com/blog/quickly-find-remediate-log4j-vulnerabilities-log4shell.md)

**BLOG POST**

Learn More

#### [Jog4j “Log4Shell” Zero-Day Vulnerability: Impact and Fixes](https://fossa.com/blog/log4j-log4shell-zero-day-vulnerability-impact-fixes.md)

**BLOG POST**

Learn More

#### [Detecting and Fixing the New Log4j DoS Vulnerability](https://fossa.com/blog/how-fix-new-log4j-dos-vulnerability-cve-2021-45105.md)

**BLOG POST**

Learn More

### FOSSA CLI

You can now use FOSSA's free CLI to detect Log4J vulnerabilities in your code. Simply download our CLI and run `fossa log4j` in your project root directory.

[View Docs](https://docs.fossa.com/docs)

### Live Demo

Watch a live demo of the vulnerability being exploited and see how you can use FOSSA’s free CLI to identify if you’re using potentially vulnerable dependencies.

<iframe src="https://www.youtube.com/embed/G6BYwEz8H5g?rel=0&controls=1&autoplay=0&mute=0&start=0" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen title="An Interactive Exploration of the Apache Log4J Vulnerability hosted by FOSSA"></iframe>

### Cheatsheet

This handy cheatsheet offers step-by-step guidance to detect, remove, upgrade, and disable vulnerable Log4J components.

[Download Now](https://go1.fossa.com/rs/246-JVA-804/images/Log4j%20Cheatsheet.pdf)

## Source

Canonical page: https://fossa.com/log4j-vulnerability-log4shell/