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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
auxera.cloudflareaccess.comNot in the scope2026-11-14
auxitius.cloudflareaccess.comNot in the scope2026-11-14
avaaz.cloudflareaccess.comNot in the scope2026-11-14
avalabs.cloudflareaccess.comNot in the scope2026-11-14
avaloq-common.cloudflareaccess.comNot in the scope2026-11-14
avantb.cloudflareaccess.comNot in the scope2026-11-14
avatarnewyorkcloud.cloudflareaccess.comNot in the scope2026-11-14
avenue.cloudflareaccess.comNot in the scope2026-11-14
avenwiki.cloudflareaccess.comNot in the scope2026-11-14
avettiteam.cloudflareaccess.comNot in the scope2026-11-14
avexon.cloudflareaccess.comNot in the scope2026-11-14
avidgaming.cloudflareaccess.comNot in the scope2026-11-14
awsdashboard.cloudflareaccess.comNot in the scope2026-11-14
axes.cloudflareaccess.comNot in the scope2026-11-14
axh.cloudflareaccess.comNot in the scope2026-11-14
axolotl.cloudflareaccess.comNot in the scope2026-11-14
axolotlcloud.cloudflareaccess.comNot in the scope2026-11-14
axosoft.cloudflareaccess.comNot in the scope2026-11-14
axselite.cloudflareaccess.comNot in the scope2026-11-14
axtelcfsso.cloudflareaccess.comNot in the scope2026-11-14
ayrenergy.cloudflareaccess.comNot in the scope2026-11-14
ayubo.cloudflareaccess.comNot in the scope2026-11-14
az-bar-foundation-restricted-access.cloudflareaccess.comvpnNot in the scope2026-11-14
azsecsso.cloudflareaccess.comNot in the scope2026-11-14
azu-red.cloudflareaccess.comNot in the scope2026-11-14
b.cloudflareaccess.comNot in the scope2026-11-14
b2c-24.cloudflareaccess.comNot in the scope2026-11-14
b2ten.cloudflareaccess.comNot in the scope2026-11-14
baaboo-web.cloudflareaccess.comNot in the scope2026-11-14
babicdev.cloudflareaccess.comNot in the scope2026-11-14
babylonhealthcfsso.cloudflareaccess.comNot in the scope2026-11-14
backofficeadmin.cloudflareaccess.comNot in the scope2026-11-14
badubies.cloudflareaccess.comNot in the scope2026-11-14
bagdonas.cloudflareaccess.comNot in the scope2026-11-14
bagsfm.cloudflareaccess.comNot in the scope2026-11-14
balanceinternetcom.cloudflareaccess.comNot in the scope2026-11-14
bamko.cloudflareaccess.comNot in the scope2026-11-14
bananamissher.cloudflareaccess.comNot in the scope2026-11-14
banananina.cloudflareaccess.comNot in the scope2026-11-14
bananastreet.cloudflareaccess.comNot in the scope2026-11-14
banderii.cloudflareaccess.comNot in the scope2026-11-14
bannernow.cloudflareaccess.comNot in the scope2026-11-14
barakahapp.cloudflareaccess.comNot in the scope2026-11-14
barcodes.cloudflareaccess.comNot in the scope2026-11-14
barmooka.cloudflareaccess.comNot in the scope2026-11-14
basic.cloudflareaccess.comNot in the scope2026-11-14
basic-nodejs-dev.cloudflareaccess.comdevNot in the scope2026-11-14
batdongsan.cloudflareaccess.comNot in the scope2026-11-14
battlebroker.cloudflareaccess.comNot in the scope2026-11-14
battledash.cloudflareaccess.comNot in the scope2026-11-14
baylume.cloudflareaccess.comNot in the scope2026-11-14
bazzofx.cloudflareaccess.comNot in the scope2026-11-14
bbertaut.cloudflareaccess.comNot in the scope2026-11-14
bboed.cloudflareaccess.comNot in the scope2026-11-14
bbpmedia.cloudflareaccess.comNot in the scope2026-11-14
bbs.cloudflareaccess.comNot in the scope2026-11-14
bbt.cloudflareaccess.comNot in the scope2026-11-14
bc.cloudflareaccess.comNot in the scope2026-11-14
bcause.cloudflareaccess.comNot in the scope2026-11-14
bcd-pages.cloudflareaccess.comNot in the scope2026-11-14
bcfootlighters.cloudflareaccess.comNot in the scope2026-11-14
bcgroup.cloudflareaccess.comNot in the scope2026-11-14
bci.cloudflareaccess.comNot in the scope2026-11-14
bci-login.cloudflareaccess.comauthNot in the scope2026-11-14
bcinfosec.cloudflareaccess.comNot in the scope2026-11-14
bcs.cloudflareaccess.comNot in the scope2026-11-14
bde.cloudflareaccess.comNot in the scope2026-11-14
bdl.cloudflareaccess.comNot in the scope2026-11-14
bdocanada.cloudflareaccess.comNot in the scope2026-11-14
bdtrust.cloudflareaccess.comNot in the scope2026-11-14
bdunderscore.cloudflareaccess.comNot in the scope2026-11-14
be-xyz.cloudflareaccess.comNot in the scope2026-11-14
beaconlights.cloudflareaccess.comNot in the scope2026-11-14
beaconmedia.cloudflareaccess.comNot in the scope2026-11-14
bear.cloudflareaccess.comNot in the scope2026-11-14
beathustlerteam.cloudflareaccess.comNot in the scope2026-11-14
beautyingiving.cloudflareaccess.comNot in the scope2026-11-14
becklegal.cloudflareaccess.comNot in the scope2026-11-14
becx-039.cloudflareaccess.comNot in the scope2026-11-14
beecrowd.cloudflareaccess.comNot in the scope2026-11-14
beeinteractive.cloudflareaccess.comNot in the scope2026-11-14
beenverified.cloudflareaccess.comNot in the scope2026-11-14
behbudov.cloudflareaccess.comNot in the scope2026-11-14
beitzinger.cloudflareaccess.comNot in the scope2026-11-14
bekstil.cloudflareaccess.comNot in the scope2026-11-14
believe-connect.cloudflareaccess.comNot in the scope2026-11-14
belltone.cloudflareaccess.comNot in the scope2026-11-14
bemer-staging.cloudflareaccess.comstagingNot in the scope2026-11-14
bendell.cloudflareaccess.comNot in the scope2026-11-14
bennythink.cloudflareaccess.comNot in the scope2026-11-14
benzinga.cloudflareaccess.comNot in the scope2026-11-14
bergsmaonline.cloudflareaccess.comNot in the scope2026-11-14
berniesanders.cloudflareaccess.comNot in the scope2026-11-14
berryenglish.cloudflareaccess.comNot in the scope2026-11-14
beshu.cloudflareaccess.comNot in the scope2026-11-14
besoyepirozi.cloudflareaccess.comNot in the scope2026-11-14
best360.cloudflareaccess.comNot in the scope2026-11-14
bestattravelco.cloudflareaccess.comNot in the scope2026-11-14
bestdail.cloudflareaccess.comNot in the scope2026-11-14
beta.cloudflareaccess.comstagingNot 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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