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Servers.guru Bug Bounty SCAM : Two Valid Reports, Zero Payment, Zero Accountability

This post documents my negative experience with the servers.guru vulnerability disclosure / bug bounty process. I am writing this publicly because private communication led nowhere, and I believe security researchers deserve honesty and transparency.

 

 




The Short Version

  • I submitted two legitimate security vulnerabilities

  • Both had real-world impact

  • Both were clearly explained with reproduction steps

  • No payment was made

  • No convincing technical justification was given

You can decide what that says about the program.


Vulnerability #1: OTP Reuse (Authentication Broken)

Category: Authentication / Logic Flaw
Severity: High

servers.guru implemented OTP in a way that defeats the entire purpose of OTP.

What Was Wrong

The same OTP could be reused multiple times instead of being invalidated after first use.

This is not a “best practice” issue.
This is OTP 101.

Why This Matters

  • OTPs are meant to be one-time

  • Reuse allows replay attacks

  • Any intercepted or logged OTP becomes reusable

  • This directly weakens account security

I provided:

  • Step-by-step reproduction

  • Clear explanation of impact

  • Proof that the OTP was reusable

Despite this, the issue was dismissed and unpaid.


Vulnerability #2: CSRF on Email Change (Account Takeover Vector)

Category: CSRF
Severity: High

The email change endpoint lacked proper CSRF protection.

What This Enables

If a logged-in user visits a malicious page, an attacker can:

  • Change the victim’s email address

  • Trigger password resets

  • Lock the victim out of their account

This is a classic account takeover scenario.

What I Provided

  • Proof-of-concept

  • Attack scenario

  • Clear explanation of impact

The response?
No reward. No meaningful explanation.


The Real Problem: Process & Accountability

Bug bounty programs live or die by trust.

In this case:

  • Reports were submitted responsibly

  • Vulnerabilities were real and reproducible

  • Communication lacked clarity

  • Rejections felt arbitrary and dismissive

When programs accept reports, fix issues, but refuse to compensate researchers without technical justification, it sends a clear mess

Your time and expertise are disposable.


Why This Feels Bad Faith

Let’s be blunt:

  • OTP reuse is not debatable

  • CSRF on email change is not theoretical

  • These are not “informational” issues

  • These are not “out of scope” tricks

If this is how valid reports are handled, calling it a “bug bounty program” is misleading.


Advice to Other Researchers

Based on my experience:

  • Do not assume good faith

  • Document everything

  • Be prepared for rejection regardless of validity

  • Decide carefully whether servers.guru is worth your time

Your effort may not be respected

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