Bug bounty reports15,219
Publicly disclosed HackerOne reports, with the platform's own outcome and severity.
| Report | Status | Weakness | Severity | Disclosed | Bounty | Votes |
|---|---|---|---|---|---|---|
| Open redirect on "Unsupported browser" warning#1977222 | Valid | Open Redirect | Medium | 2023-06-22 | $150 | 8 |
| https://xmpp.nextcloud.com///;@www.google.com allows open redirect#211213 | Valid | Open Redirect | – | 2017-08-13 | – | 20 |
| Open redirect in user_saml via RelayState parameter#2263044 | Valid | Open Redirect | Low | 2024-01-18 | – | 21 |
| Event create can create attachments that link to other websites#2457588 | Valid | Open Redirect | Medium | 2024-07-14 | $250 | 25 |
| Open redirect when logging in with user_oidc#2720030 | Valid | Open Redirect | – | 2024-11-15 | – | 30 |
| http://www.nextcloud.com/wp-includes/js/swfupload/swfupload.swf allows open redirect / site defacement#209520 | Valid | Open Redirect | – | 2020-03-07 | – | 42 |
Status and severity are HackerOne's. “Access stated” is what the title says; “Access needed” and techniques come from CyberSIXT's analysis of the public report (779 analysed so far), which can be wrong. Data as of 2026-11-14.