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Alacran Labs AI
2 min readJul 20, 2024

Security Flaw Discovered in a16z Website Exposing Company Data

Imagine sipping on your morning coffee and discovering that a massive Silicon Valley venture capital firm has just had a major security scare. That’s exactly what happened when a security researcher, xyzeva, found a vulnerability in a16z’s web app. This glitch exposed sensitive data about the firm’s portfolio companies, and boy, it was a big deal!

Security Flaw Image

So, What Happened?

It all started when xyzeva, a keen-eyed security researcher, stumbled upon a “really simple” bug in the a16z portfolio portal. This bug was a gateway to:

  • Emails and passwords
  • Company details
  • Employee information

And here’s the kicker — it even allowed xyzeva to send emails as if they were from a16z itself and access previous communications via Mailgun. Quite a Pandora’s box, right?

The Immediate Fix

The good news is that a16z jumped on this issue and fixed it the same day xyzeva reported it. They were quick to confirm that no sensitive data was compromised, which is pretty reassuring.

The Bug Bounty Debate

But here’s where it gets interesting — a16z doesn’t have a formal bug bounty program. They expressed interest in discussing it with xyzeva, but things got tricky over how the disclosure was handled and the tone of xyzeva’s posts. It looks like this security scare might push a16z to consider a more structured approach to bug reporting in the future.

The Portal Now

Oh, and by the way, the portal where this all went down is now deprecated. So, you don’t have to worry about this specific flaw anymore.

A Quick Peek at a16z

For those not in the know, a16z is a heavyweight in the venture capital world. They’ve backed giants like Airbnb, Coinbase, Instacart, Lyft, and Slack. Recently, their founders, Marc Andreesen and Ben Horowitz, announced their support for Donald Trump in the upcoming presidential elections.

It’s a rollercoaster, isn’t it? From discovering glaring security flaws to political endorsements, a16z never seems to be out of the spotlight!

Final Thoughts

This whole incident serves as a stark reminder of the vulnerabilities lurking in our digital frameworks. Whether you are a small startup or a gigantic venture capital firm, security is everyone’s business. I’m curious to see how a16z will handle bug reporting moving forward. Maybe this scare will be the nudge they need to set up that bug bounty program after all.

Stay safe online, folks!

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