Bug bounty reports15,219
Publicly disclosed HackerOne reports, with the platform's own outcome and severity.
| Report | Status | Weakness | Severity | Disclosed | Bounty | Votes |
|---|---|---|---|---|---|---|
| Bypass R2 payment screenAnalysed#2170559 | Valid | Authentication | Medium | 2023-11-10 | $350 | 57 |
| Enable 2Fa verification without verifying emailAnalysed#1618021 | Valid | Access Control | Medium | 2022-08-31 | – | 40 |
| Arbitrary file read from Cloudflare Pages build environmentAnalysed#1570874 | Valid | No weakness recorded | Medium | 2024-02-23 | – | 40 |
| Take over subdomains of r2.dev using R2 custom domainsAnalysed#1700276 | Valid | No weakness recorded | Medium | 2022-09-28 | $1,125 | 28 |
| Cloudflare is not properly deleting user's accountAnalysed#1728292 | Valid | Input Validation and Logic | Medium | 2023-04-13 | – | 23 |
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, where there is one, which can be wrong. Data as of 2026-11-15.