QuoteIn early November, a well-known and respected security researcher by the name of Tavis Ormandy alerted us to several security vulnerabilities in the consumer version of Malwarebytes Anti-Malware.
Within days, we were able to fix several of the vulnerabilities server-side and are now internally testing a new version (2.2.1) to release in the next 3-4 weeks to patch the additional client-side vulnerabilities. At this time, we are still triaging based on severity. [...]
https://blog.malwarebytes.org/news/2016/02/malwarebytes-anti-malware-vulnerability-disclosure/
What this means is - look for a new version of Malwarebytes through the internal update mechanism or via direct download - depending on how it's rolled out.