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SIDN

Vulnerability disclosure program on security.txt sidn.nl

Accepting reports security.txt
Go to program Website
Top reward
No cash rewards
Top severity paid
Not published
Assets in scope
2
Public CVEs
0
Last change
No changes yet

At a glance

What to know before you start testing.

No cash rewards
A disclosure program: you report for credit, not money.
Report by email
[email protected]
Partial safe harbor
Some legal protection; read the terms.
Replies within 1 day
As the policy promises.
Publish after a fix
Coordinate the timing with the company.

Rewards

What the company's own policy page says it pays.

This program does not pay cash rewards.

Response
Within 1 days We'll e-mail you within one working day, confirming receipt of your report.
Safe harbor
Partial Don't abuse a vulnerability you've discovered. If you do, we'll inform the police.

Summarised with AI from the company's policy, read 12 Nov 2026, and checked word for word against it. Read the original

Scope

2 assets you may test, 2 excluded.

Domains 2

  • sidn.nl
  • time.nl
Out of scope (2)
  • Registered public IP addresses
  • Services running at thirdparty service providers

Rules

What the policy asks of you, and the bug types it won't reward, quoted from SIDN's policy. "We" in these lines means the program, not this site.

While testing

  • Don't tell anyone what you found.
  • Destroy any data you've stumbled on.
  • Don't go deeper into our systems than you need to in order to show that there's a problem.
  • Don't abuse a vulnerability you've discovered. If you do, we'll inform the police.

Not accepted

  • Social Engineering.
  • Resource exhaustion / (Distributed) Denial of Service.
  • Physical Access Testing
  • Situations that cannot be reproduced;Exploits that are not validated with a second tool/method, i.e. wrong result in tool A, right result in tool B
  • Cosmetical level issues, i.e. this does not look good in browser A
  • Situations where the problem lies on user (awareness) level, i.e. can be exploited when the workplace is left unprotected, click or keypress combo's.
  • Simple fingerprinting or version listings on OS, services or ports.
  • Reporting of publicly available files that contain public information
  • Secure/HTTP-only flag missing on cookies containing public information only
  • TLS misconfiguration without a proof of concept to exploit the weakness
  • Incomplete or missing SPF, DKIM or DMARC records
  • E-mail addresses found at a third party data breach
  • Publicly disclosed vulnerabilities, patched within the last 2 weeks
  • URL redirection (to a valid webpage)
  • Local content spoofing / clickjacking
  • Public files and information leakage through metadata
  • Missing security headers, options and flags
  • Outdated versions without proof-of-concept or working exploit.

Summarised with AI from the company's policy, read 12 Nov 2026, and checked word for word against it. Read the original

Changes

Tracked since 12 Nov 2026. Last checked 2 hours ago.

No changes yet. When the rewards or scope move, you will see it here and in the RSS feed.

Public CVEs

Published vulnerabilities in this vendor's products, from the NVD.

Search NVD

No CVEs matched yet. We match NVD records by vendor name, so products sold under another name can be missing.