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Responsible Reporting

We at Euronext Securities Oslo consider the security of our systems a top priority. But no matter how much effort we put into system security, there can still be vulnerabilities present. 

If you discover a vulnerability, we would like to know about it so we can take steps to address it as quickly as possible. We would like to ask you to help us better protect our clients and our systems.


At present, Euronext Securities Oslo Responsible Disclosure Programme applies to security vulnerabilities discovered in the following web location:

  • • *
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Rules of engagement

Please read the following rules before reporting a vulnerability: 

  • Do not intentionally access non-public Euronext Securities Oslo data any more than is necessary to demonstrate the vulnerability 
  • Do not permanently modify or delete Euronext Securities Oslo hosted data 
  • Do not DDoS or otherwise disrupt, interrupt or degrade our internal or external services 
  • Do not put a backdoor in the system, not even for the purpose of showing the vulnerability 
  • Do not share confidential information obtained from Euronext Securities Oslo 
  • Social engineering is out of scope. Do not send phishing emails to, or use other social engineering techniques against, anyone, including Euronext Securities Oslo staff, members, vendors, or partners 
  • Do not utilise any brute-force techniques (e.g. repeatedly entering passwords) in order to gain access to the system 
  • Do not attack, in any way, our end users, or engage in trade of stolen user credentials. However, should you become aware of such trade, we would certainly appreciate being informed 

What not to report

The following is excluded from our Responsible Disclosure program: 

  • Any vulnerabilities without a properly described evidence report of proof of possible exploitation 
  • Social engineering
  • Physical vulnerabilities
  • Man in the middle attacks out of our control
  • Reports generated by automated scan tools (e.g. Nmap scan results) 
  • Publicly available information and/or browser instructions, such as:  
    • Our policies on presence or absence of SPF/DKIM/DMARC records or Cross Site Request Forgery (CSRF) vulnerabilities on unauthenticated pages  
    • HTML character set vulnerabilities such as “does not specify” or “unrecognized” 
    • Lack of secure/HTTP Only flags on non-sensitive cookies 
    • Absence of using HTTP Strict Transport Security (HSTS) 
    • Clickjacking or the non-existence of X-Frame-Options on non-logon pages 
    • Cacheable HTTPS response pages on sites that do not provide any capabilities 
    • Reports of insecure SSL/TLS ciphers  
    • Vulnerabilities only affecting users of outdated or unpatched browsers and platforms or for users who have intentionally reduced security settings on their platform 
    • Vulnerabilities which require a jailbroken device, unless they enable a server-side compromise 

How to report:

  • E-mail your findings to . Encrypt your findings using our PGP key to prevent this critical information from falling into the wrong hands.
  • When you contact us, please include the location where you found the issue and as many details as possible to help us identify the exact area of the issue. If we believe that more information is required, we will contact you. 
  • If you wish to report the issue anonymously, please state this in your communication, and we will not contact you or retain your personal information. Read more about our GDPR policy in our privacy statement
  • Please note that we register your data in connection with our case processing.
  • Do not take advantage of the vulnerability or problem you have discovered, for example by downloading more data than necessary to demonstrate the vulnerability or deleting or modifying other people’s data,
  • Do not reveal the problem to others until it has been resolved,
  • Do not use attacks on physical security, social engineering, distributed denial of service, spam or applications of third parties, and
  • Do provide sufficient information to reproduce the problem, so we will be able to resolve it as quickly as possible. Usually, the IP address or the URL of the affected system and a description of the vulnerability will be sufficient, but complex vulnerabilities may require further explanation.

What we promise:

  • We will respond to your report within 3 business days with our evaluation of the report and an expected resolution date,
  • If you have followed the instructions above, we will not take any legal action against you in regard to the report,
  • We will handle your report with strict confidentiality, and not pass on your personal details to third parties without your permission,
  • We will keep you informed of the progress towards resolving the problem,
  • In the public information concerning the problem reported, we will give your name as the discoverer of the problem (unless you desire otherwise), and
  • As a token of our gratitude for your assistance, we issue a letter of recommendation recognizing your effort and describe how you helped us improve our security.

We strive to resolve all problems as quickly as possible. If a vulnerability is found, we would like to play an active role in detecting and solving the problem.