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Bug bounty reports15,219

Publicly disclosed HackerOne reports, with the platform's own outcome and severity.

Program:Cloudflare Public Bug Bounty
Status
Severity
Weakness
Year:2025
Clear
Bounty paid1
Access stated
  • No account0
  • A user account0
  • Admin or privileged0
Access needed
Technique
Clear filters4 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
Any WARP User Can Access Organization-Specific Application#2802817InformativeAuthenticationNone2025-05-19–46
Second-Order XSS via javascript protocol in MCP Server Portal Apps leads to ATOAnalysed#3316910ValidCross-site ScriptingLow2025-12-16–50
`use-mcp`'s oauth2 process uses a window.open call with untrusted mcp server provided data allowing for code execution under the page using itAnalysed#3211031ValidCross-site ScriptingMedium2025-09-30$55075
Bypass of Cloudflare's Cache Keys and WAF via header overflow#3027461ValidAccess ControlHigh2025-11-18–77

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.