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Bug bounty program

CP

Cloudflare Public Bug Bounty

Open on HackerOneAtlas
Platform
HackerOne
Bounties
Pays
Assets in scope
51
Disclosed reports
44
Subdomains
24,298
Vendor on CyberSIXT
Cloudflare (70 CVEs, 0 exploited)

Most upvoted reports44

All reports
Most upvoted reports of Cloudflare Public Bug Bounty
ReportWeaknessDisclosedBountyVotes
HTTP Request Smuggling in Transform Rules using hexadecimal escape sequences in the concat() functionAnalysed#1478633Injection and Smuggling2022-05-16$6,000116
Cloudflare CASB Confused Deputy ProblemAnalysed#1952124No weakness recorded2023-06-07$3,30097
Using special IPv4-mapped IPv6 addresses to bypass local IP banAnalysed#1785260No weakness recorded2023-01-24$7,50078
Bypass of Cloudflare's Cache Keys and WAF via header overflow#3027461Access Control2025-11-18–77
Hijack all emails sent to any domain that uses Cloudflare Email ForwardingAnalysed#1419341Access Control2022-07-28$6,00076
`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#3211031Cross-site Scripting2025-09-30$55075
Yet Another CASB Integration Takeover of Active IntegrationsAnalysed#2094346No weakness recorded2023-11-13–68
[Variation of #3321406] YetAnother 1-Click Chaining of Self-XSS, Cookie Tossing and AntiCSRF Token Prediction leads to auto approval in AccessTempAuthAnalysed#3423950Cross-site Scripting2026-04-14–63
AI Playground XSS to steal user-chat messages and access to connected MCP ServerAnalysed#3424998Cross-site Scripting2026-02-26–62
Bypass R2 payment screenAnalysed#2170559Authentication2023-11-10$35057

Subdomains24,298

Root:cloudflareaccess.com
Scope
Name suggests
First seen
Text fileClear filters4,882 names
Subdomains of Cloudflare Public Bug Bounty
NameScopeFirst seen
abhish.cloudflareaccess.comNot in the scope2026-11-14
abraxas678.cloudflareaccess.comNot in the scope2026-11-14
absolutedesignsupport.cloudflareaccess.comNot in the scope2026-11-14
abusayed0206.cloudflareaccess.comNot in the scope2026-11-14
acapi.cloudflareaccess.comNot in the scope2026-11-14
access-control.cloudflareaccess.comvpnNot in the scope2026-11-14
access-hub.cloudflareaccess.comvpnNot in the scope2026-11-14
access-testing.cloudflareaccess.comtest, vpnNot in the scope2026-11-14
accesskey.cloudflareaccess.comNot in the scope2026-11-14
accessmn.cloudflareaccess.comNot in the scope2026-11-14
accessrigging.cloudflareaccess.comNot in the scope2026-11-14
accountable2you.cloudflareaccess.comNot in the scope2026-11-14
ace.cloudflareaccess.comNot in the scope2026-11-14
acessolopesadvogados.cloudflareaccess.comNot in the scope2026-11-14
acme.cloudflareaccess.comNot in the scope2026-11-14
acmeserviceco.cloudflareaccess.comNot in the scope2026-11-14
acmicpc.cloudflareaccess.comNot in the scope2026-11-14
acordocerto.cloudflareaccess.comNot in the scope2026-11-14
acsacsar.cloudflareaccess.comNot in the scope2026-11-14
acsb-team.cloudflareaccess.comNot in the scope2026-11-14
actioncoin.cloudflareaccess.comNot in the scope2026-11-14
actiondigital.cloudflareaccess.comNot in the scope2026-11-14
actionsack.cloudflareaccess.comNot in the scope2026-11-14
actoweb.cloudflareaccess.comNot in the scope2026-11-14
acutraq.cloudflareaccess.comNot in the scope2026-11-14
adactus.cloudflareaccess.comNot in the scope2026-11-14
adamo.cloudflareaccess.comNot in the scope2026-11-14
adamshea.cloudflareaccess.comNot in the scope2026-11-14
adaptivehealth.cloudflareaccess.comNot in the scope2026-11-14
adaptivesecurity.cloudflareaccess.comNot in the scope2026-11-14
adarshthapa.cloudflareaccess.comNot in the scope2026-11-14
adc.cloudflareaccess.comNot in the scope2026-11-14
adclick.cloudflareaccess.comNot in the scope2026-11-14
addiss.cloudflareaccess.comNot in the scope2026-11-14
adelrue.cloudflareaccess.comNot in the scope2026-11-14
adlp.cloudflareaccess.comNot in the scope2026-11-14
admin.cloudflareaccess.comadminNot in the scope2026-11-14
admin-accesschallenge.cloudflareaccess.comadminNot in the scope2026-11-14
adminbygoodiebox.cloudflareaccess.comNot in the scope2026-11-14
admindev.cloudflareaccess.comNot in the scope2026-11-14
admindigi.cloudflareaccess.comNot in the scope2026-11-14
adrenalyz.cloudflareaccess.comNot in the scope2026-11-14
adserver.cloudflareaccess.comNot in the scope2026-11-14
adsvising.cloudflareaccess.comNot in the scope2026-11-14
advena.cloudflareaccess.comNot in the scope2026-11-14
adventist.cloudflareaccess.comNot in the scope2026-11-14
adventistro.cloudflareaccess.comNot in the scope2026-11-14
adventures.cloudflareaccess.comNot in the scope2026-11-14
adventuretravel.cloudflareaccess.comNot in the scope2026-11-14
advertia.cloudflareaccess.comNot in the scope2026-11-14
adverts-access.cloudflareaccess.comvpnNot in the scope2026-11-14
advrm.cloudflareaccess.comNot in the scope2026-11-14
aeccglobalhome.cloudflareaccess.comNot in the scope2026-11-14
aegsys.cloudflareaccess.comNot in the scope2026-11-14
aella.cloudflareaccess.comNot in the scope2026-11-14
aeonct.cloudflareaccess.comNot in the scope2026-11-14
aerostarairports.cloudflareaccess.comNot in the scope2026-11-14
afcld3-pages.cloudflareaccess.comNot in the scope2026-11-14
affclub.cloudflareaccess.comNot in the scope2026-11-14
affliction.cloudflareaccess.comNot in the scope2026-11-14
afn.cloudflareaccess.comNot in the scope2026-11-14
afoo.cloudflareaccess.comNot in the scope2026-11-14
afraid.cloudflareaccess.comNot in the scope2026-11-14
africhange.cloudflareaccess.comNot in the scope2026-11-14
afterpay.cloudflareaccess.comNot in the scope2026-11-14
agenciaplanner.cloudflareaccess.comNot in the scope2026-11-14
agiledefense.cloudflareaccess.comNot in the scope2026-11-14
aglasem.cloudflareaccess.comNot in the scope2026-11-14
agou.cloudflareaccess.comNot in the scope2026-11-14
aholyduck.cloudflareaccess.comNot in the scope2026-11-14
ai.cloudflareaccess.comNot in the scope2026-11-14
aidem.cloudflareaccess.comNot in the scope2026-11-14
aidexcloud.cloudflareaccess.comNot in the scope2026-11-14
aiello.cloudflareaccess.comNot in the scope2026-11-14
aiforever.cloudflareaccess.comNot in the scope2026-11-14
aigainc.cloudflareaccess.comNot in the scope2026-11-14
aijobs.cloudflareaccess.comNot in the scope2026-11-14
aikarrie.cloudflareaccess.comNot in the scope2026-11-14
aingbm.cloudflareaccess.comNot in the scope2026-11-14
airbaltic.cloudflareaccess.comNot in the scope2026-11-14
airdna.cloudflareaccess.comNot in the scope2026-11-14
airsculptdevelopment.cloudflareaccess.comNot in the scope2026-11-14
airxone.cloudflareaccess.comNot in the scope2026-11-14
ais.cloudflareaccess.comNot in the scope2026-11-14
aitrading.cloudflareaccess.comNot in the scope2026-11-14
aiudapp.cloudflareaccess.comNot in the scope2026-11-14
aixlab.cloudflareaccess.comNot in the scope2026-11-14
ajicseguroscom.cloudflareaccess.comNot in the scope2026-11-14
ajnart.cloudflareaccess.comNot in the scope2026-11-14
ajobthing.cloudflareaccess.comNot in the scope2026-11-14
ajwen.cloudflareaccess.comNot in the scope2026-11-14
akamai.cloudflareaccess.comNot in the scope2026-11-14
akamai-test.cloudflareaccess.comtestNot in the scope2026-11-14
akemi.cloudflareaccess.comNot in the scope2026-11-14
akeroh.cloudflareaccess.comNot in the scope2026-11-14
akila.cloudflareaccess.comNot in the scope2026-11-14
akitamedia.cloudflareaccess.comNot in the scope2026-11-14
akrahotels.cloudflareaccess.comNot in the scope2026-11-14
akrunow.cloudflareaccess.comNot in the scope2026-11-14
akvadrat.cloudflareaccess.comNot in the scope2026-11-14

18,935 names are covered by the program's own scope; 2 were first seen this week. Names come from ProjectDiscovery's public Chaos dataset (passive sources: certificate logs, DNS and other public data), matched to the program by its listing and its own domain scope. A name being in a dataset is not permission to test it: only what the program's own scope says is in scope, and its policy decides. CyberSIXT does not resolve, probe or scan these names. Tags come from the name alone. Source: ProjectDiscovery Chaos. Subdomains on the Atlas, or search the subdomains of every program.

A name in a dataset is not permission to test it: the program's own scope and rules decide. Data as of 2026-11-15.

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