This document was last updated on January 1st, 2026.
We consider the security of our systems and especially customer data a top priority. But no matter how much effort we put into system security, the possibility of vulnerabilities arising is ever present.
If you happen to discover such a vulnerability, we would like to know about it so we can take steps to address it as quickly as possible. Doing so will help us better protect our clients and our systems.
We do not accept automatically generated reports of ANY kind, be it automated "security checks" or LLM outputs. Nor do we accept the insane barrage of reports about "Insecure TLS cipher enabled" mostly originating from Indian spammers. If you got to this page by Googling "disclosure" "the reward will be", you will be banned from my mailserver forever.
Please take the following steps if you find a vulnerability:
- E-mail your findings to security@osk.sh. Please encrypt your findings using our PGP key to prevent critical information from falling into the wrong hands,
- 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 and all clients are known safe,
- 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, a description of the vulnerability will be sufficient, but complex vulnerabilities may require further explanation.
In turn, we promise the following:
- We will respond to your report within 7 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 will not pass on your personal details to third parties without your explicit permission,
- We will keep you informed of the progress towards resolving the problem,
- If applicable, in the public information concerning the problem reported, we will give your chosen name as the discoverer of the problem (unless you desire otherwise), and
- As a token of our gratitude for your assistance, we offer a reward for every report of a security problem that was not yet known to us. The amount of the reward will be determined based on the severity of the vulnerability and the quality of the report. The minimum reward will be (a) for TETR.IO vulnerabilities, 12 months of TETR.IO Supporter added to your account or its cash equivalent, as well as an exclusive TETR.IO profile badge, or (b) for other vulnerabilities, USD 50.
We strive to resolve all problems as quickly as possible, and would like to play an active role in the ultimate publication on the problem (if applicable) after it is resolved.
If you have any further inquiries or questions regarding this policy, please do not hesitate to send an e-mail to security@osk.sh. Please note that emails not about security or this policy (including marketing mail) will be ignored.