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SIDN bug bounty programs

sidn.nl Updated

SIDN runs two public programs: a security.txt disclosure program with no cash rewards and a security.txt disclosure program with no cash rewards.

Top reward
No cash
Disclosure only
Programs
2
None pays cash
Targets in scope
3
1 type, deduplicated
Last change
12 Nov 2026
3 hours ago

Where to report

2 programs, side by side. Report where the affected target is in scope; when two programs cover it, pick the one that pays more.

Start here

SIDN

security.txt · A disclosure program: you report for credit, not cash.
  • SIDN

    security.txt · Disclosure only

    Open

    Top reward

    No cash
    Safe harbor
    Partial
    First response
    24 hours promised
  • SIDN

    security.txt · Disclosure only

    Open

    Top reward

    No cash
    Safe harbor
    Partial
    First response
    24 hours promised

Amounts are the top reward per severity in the currency each program pays. Green marks the highest per severity. First response is the platform's measured average when it publishes one, else what the policy promises.

What is in scope

3 targets across all 2 programs, each listed once with the programs that cover it. 4 excluded.

  • sidn.nl

    Domains

    Covered by SIDN, SIDN

  • sidnlabs.nl

    Domains

    Covered by SIDN

  • time.nl

    Domains

    Covered by SIDN

No target matches. Try part of a host name, such as the company name.

Out of scope 4

Don't test these. A program can exclude a host another program covers; the program you report to decides.

  • Diensten draaiende bij derde partijen

    SIDN

  • Fysieke aanvallen (in persoon).

    SIDN

  • Registered public IP addresses

    SIDN

  • Services running at thirdparty service providers

    SIDN

Recent changes

Reward and scope changes across every SIDN program, newest first.

  • SIDN

    Scope + security.txt

    Added to scope: sidnlabs.nl

All changes · RSS feed

About this page

This page gathers every public program listed under sidn.nl: platform programs, self-hosted policies and security.txt contacts. Each program's own policy decides what is in scope and what it pays; check it before you test.

Something wrong or missing? Report a correction.