Security News > 2021 > December > Log4j: How to protect yourself from this security vulnerability
The Log4j security vulnerability known as Log4Shell is shaping up to be one of the worst security flaws of the year, potentially affecting millions of applications and painting a bullseye on unpatched systems that hackers can compromise and control.
Revealed last week but reported to Apache in November, Log4Shell is a zero-day vulnerability in the company's Log4J utility, which is used by developers and organizations around the world to log requests and error messages for Java applications.
Open source security provider WhiteSource released a free developer tool called WhiteSource Log4j Detect that organizations can run to detect and resolve Log4j vulnerabilities.
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