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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
lmeier.cloudflareaccess.comNot in the scope2026-11-14
lmntr.cloudflareaccess.comNot in the scope2026-11-14
lmsin.cloudflareaccess.comNot in the scope2026-11-14
loadshare.cloudflareaccess.comNot in the scope2026-11-14
localease.cloudflareaccess.comNot in the scope2026-11-14
localhost.cloudflareaccess.comdevNot in the scope2026-11-14
localix.cloudflareaccess.comNot in the scope2026-11-14
localley.cloudflareaccess.comNot in the scope2026-11-14
localvolts.cloudflareaccess.comNot in the scope2026-11-14
locker.cloudflareaccess.comNot in the scope2026-11-14
lodgify.cloudflareaccess.comNot in the scope2026-11-14
lodl.cloudflareaccess.comNot in the scope2026-11-14
logangarcia.cloudflareaccess.comNot in the scope2026-11-14
logentis.cloudflareaccess.comNot in the scope2026-11-14
logflare.cloudflareaccess.comNot in the scope2026-11-14
logicinbound.cloudflareaccess.comNot in the scope2026-11-14
login.cloudflareaccess.comauthNot in the scope2026-11-14
login-auth.cloudflareaccess.comauthNot in the scope2026-11-14
logintravel.cloudflareaccess.comNot in the scope2026-11-14
logmein.cloudflareaccess.comNot in the scope2026-11-14
logo.cloudflareaccess.comNot in the scope2026-11-14
lokimox.cloudflareaccess.comNot in the scope2026-11-14
lol.cloudflareaccess.comNot in the scope2026-11-14
loligo.cloudflareaccess.comNot in the scope2026-11-14
lonsdaledr.cloudflareaccess.comNot in the scope2026-11-14
lookingforaclan.cloudflareaccess.comNot in the scope2026-11-14
loplabbet.cloudflareaccess.comNot in the scope2026-11-14
lordran.cloudflareaccess.comNot in the scope2026-11-14
loreal.cloudflareaccess.comNot in the scope2026-11-14
loreal-lofi.cloudflareaccess.comNot in the scope2026-11-14
lorealpe.cloudflareaccess.comNot in the scope2026-11-14
losslessone.cloudflareaccess.comNot in the scope2026-11-14
lostwoods.cloudflareaccess.comNot in the scope2026-11-14
lottiefiles.cloudflareaccess.comNot in the scope2026-11-14
lottob.cloudflareaccess.comNot in the scope2026-11-14
lottobytext.cloudflareaccess.comNot in the scope2026-11-14
lottocom.cloudflareaccess.comNot in the scope2026-11-14
lou.cloudflareaccess.comNot in the scope2026-11-14
loudkeyboard.cloudflareaccess.comNot in the scope2026-11-14
loudlark.cloudflareaccess.comNot in the scope2026-11-14
loumikey.cloudflareaccess.comNot in the scope2026-11-14
loutonium.cloudflareaccess.comNot in the scope2026-11-14
loveandtol.cloudflareaccess.comNot in the scope2026-11-14
loveenergysavings.cloudflareaccess.comNot in the scope2026-11-14
loyagami.cloudflareaccess.comNot in the scope2026-11-14
lp.cloudflareaccess.comNot in the scope2026-11-14
lst20080kelvin.cloudflareaccess.comNot in the scope2026-11-14
ltwt.cloudflareaccess.comNot in the scope2026-11-14
luandev.cloudflareaccess.comNot in the scope2026-11-14
luas.cloudflareaccess.comNot in the scope2026-11-14
lubecorp.cloudflareaccess.comNot in the scope2026-11-14
lucafroeschke.cloudflareaccess.comNot in the scope2026-11-14
lucasfam.cloudflareaccess.comNot in the scope2026-11-14
lucidya.cloudflareaccess.comNot in the scope2026-11-14
luckvintage.cloudflareaccess.comNot in the scope2026-11-14
luggit.cloudflareaccess.comNot in the scope2026-11-14
lukeloewe.cloudflareaccess.comNot in the scope2026-11-14
lukonet.cloudflareaccess.comNot in the scope2026-11-14
lull.cloudflareaccess.comNot in the scope2026-11-14
luminary.cloudflareaccess.comNot in the scope2026-11-14
luminarydigital.cloudflareaccess.comNot in the scope2026-11-14
lumion.cloudflareaccess.comNot in the scope2026-11-14
lunarimagehosting.cloudflareaccess.comNot in the scope2026-11-14
lurelink.cloudflareaccess.comNot in the scope2026-11-14
lutheranworld.cloudflareaccess.comNot in the scope2026-11-14
lutonite.cloudflareaccess.comNot in the scope2026-11-14
luxbp.cloudflareaccess.comNot in the scope2026-11-14
luxnet.cloudflareaccess.comNot in the scope2026-11-14
luzhengda.cloudflareaccess.comNot in the scope2026-11-14
lv1dev.cloudflareaccess.comdevNot in the scope2026-11-14
lwf-assembly.cloudflareaccess.comNot in the scope2026-11-14
lwhite.cloudflareaccess.comNot in the scope2026-11-14
lxptech.cloudflareaccess.comNot in the scope2026-11-14
lyst.cloudflareaccess.comNot in the scope2026-11-14
m.cloudflareaccess.comNot in the scope2026-11-14
m-f.cloudflareaccess.comNot in the scope2026-11-14
m0.cloudflareaccess.comNot in the scope2026-11-14
m0nikasingh.cloudflareaccess.comNot in the scope2026-11-14
m9.cloudflareaccess.comNot in the scope2026-11-14
maartenminten.cloudflareaccess.comNot in the scope2026-11-14
maatforce.cloudflareaccess.comNot in the scope2026-11-14
mackenzie-serres.cloudflareaccess.comNot in the scope2026-11-14
macrumors.cloudflareaccess.comNot in the scope2026-11-14
madaraecom.cloudflareaccess.comNot in the scope2026-11-14
madarat.cloudflareaccess.comNot in the scope2026-11-14
madrabbit.cloudflareaccess.comNot in the scope2026-11-14
magiceden.cloudflareaccess.comNot in the scope2026-11-14
magicleap.cloudflareaccess.comNot in the scope2026-11-14
magicparfumco.cloudflareaccess.comNot in the scope2026-11-14
magicplan.cloudflareaccess.comNot in the scope2026-11-14
magicstaging.cloudflareaccess.comNot in the scope2026-11-14
maglr.cloudflareaccess.comNot in the scope2026-11-14
magus3.cloudflareaccess.comNot in the scope2026-11-14
maguschat.cloudflareaccess.comNot in the scope2026-11-14
mail.cloudflareaccess.commailNot in the scope2026-11-14
mail1.cloudflareaccess.commailNot in the scope2026-11-14
mail2.cloudflareaccess.commailNot in the scope2026-11-14
mailergroup.cloudflareaccess.comNot in the scope2026-11-14
mailerlite.cloudflareaccess.comNot in the scope2026-11-14
mailingstore.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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