💡 TLDR: Report issues at hackerone.com/nextcloud
Security is very important to us.
If you believe you have found a security vulnerability that meets our definition of a security vulnerability, please report is as described below.
Please review our threat model and accepted risks to learn what is currently considered a security vulnerability versus expected behavior. And review what is considered in scope or bounty eligible.
If you have discovered a security matter with Nextcloud, please read our responsible disclosure guidelines and contact us at hackerone.com/nextcloud.
Your report should include:
- Product version
- A vulnerability description
- Reproduction steps
- Any other details you think are likely to be important
You should receive an initial acknowledgement within 24 hours in most cases.
A member of the security team will confirm the vulnerability, determine its impact, follow-up with any questions, and coordinate the fix and publication.
The fix will be applied to all applicable and still supported stable branches, tested, and packaged in the next security release. The vulnerability will be publicly announced after the release. Finally, your name will be added to the hall of fame as a thank you from the entire Nextcloud community.
If the vulnerability involves an app that is not maintained by Nextcloud (i.e. hosted by the Nextcloud project but community maintained, or hosted elsewhere), the security team will try to coordinate with the current maintainer and help to get the issue fixed in similar fashion.
If you are reporting for a bug bounty, more complete reports can contribute to a higher bounty award. Details on past bounty ranges can be found at hackerone.com/nextcloud.
Published security advisories for the Nextcloud Server, Clients and Apps can be viewed at https://github.com/nextcloud/security-advisories/security/advisories.
Only the latest version is supported. We release every second month a feature release (currently 3.x) and inbetween a bug fix release (3.x.y).
Please visit https://nextcloud.com/security/ for further information about Nextcloud security. Please visit https://nextcloud.com/security/threat-model for our threat model and accepted risks.