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Bug bounty program

SL

Slack

Open on HackerOneAtlas
Platform
HackerOne
Bounties
Pays
Assets in scope
19
Disclosed reports
133
Subdomains
137,436
Vendor on CyberSIXT
Slack (3 CVEs, 0 exploited)

Most upvoted reports133

All reports
Most upvoted reports of Slack
ReportWeaknessDisclosedBountyVotes
Mass account takeovers using HTTP Request Smuggling on https://slackb.com/ to steal session cookiesAnalysed#737140Injection and Smuggling2020-03-12–870
Remote Code Execution in Slack desktop apps + bonusAnalysed#783877Command and Code Injection2020-08-28–509
XSS vulnerable parameter in a location hashAnalysed#146336Cross-site Scripting2019-10-16–455
URL link spoofingAnalysed#481472Input Validation and Logic2020-04-26$250362
TURN server allows TCP and UDP proxying to internal network, localhost and meta-data servicesAnalysed#333419Server-Side Request Forgery2020-03-12$3,500323
AWS bucket leading to iOS test build code and configuration exposureAnalysed#404822Information Disclosure2019-02-23$1,500321
Slack DTLS uses a private key that is in the public domain, which may lead to SRTP stream hijackAnalysed#531032Cryptography2020-03-12$2,000170
XSS in gist integrationAnalysed#11073Cross-site Scripting2019-04-28$500157
Unauthenticated LFI revealing log informationAnalysed#272578Information Disclosure2018-01-26–123
Stealing xoxs-tokens using weak postMessage / call-popup redirect to current team domainAnalysed#207170Misconfiguration and Insecure Design2017-02-28–120

Subdomains137,436

Root
Scope
Name suggests
First seen
Text file137,436 names
Subdomains of Slack
NameScopeFirst seen
www.build.quip.comciIn scope2026-11-14
builder.quip.comIn scope2026-11-14
building.quip.comIn scope2026-11-14
buildstorm.quip.comIn scope2026-11-14
bulgaria.quip.comIn scope2026-11-14
bulk.quip.comIn scope2026-11-14
www.bulk.quip.comIn scope2026-11-14
bulkemail.quip.comIn scope2026-11-14
bulkmail.quip.comIn scope2026-11-14
bulksms.quip.comIn scope2026-11-14
bull.quip.comIn scope2026-11-14
bulldog.quip.comIn scope2026-11-14
bullet.quip.comIn scope2026-11-14
bulletin.quip.comIn scope2026-11-14
bulten.quip.comIn scope2026-11-14
bumblebee.quip.comIn scope2026-11-14
bunny.quip.comIn scope2026-11-14
burbank.quip.comIn scope2026-11-14
burfordheating.quip.comIn scope2026-11-14
burn.quip.comIn scope2026-11-14
burns.quip.comIn scope2026-11-14
bursa.quip.comIn scope2026-11-14
bus.quip.comIn scope2026-11-14
buscador.quip.comIn scope2026-11-14
business.quip.comIn scope2026-11-14
autoconfig.business.quip.comIn scope2026-11-14
autodiscover.business.quip.commailIn scope2026-11-14
webdisk.business.quip.comIn scope2026-11-14
www.business.quip.comIn scope2026-11-14
butler.quip.comIn scope2026-11-14
butterfly.quip.comIn scope2026-11-14
butters.quip.comIn scope2026-11-14
buu.quip.comIn scope2026-11-14
buy.quip.comIn scope2026-11-14
buycryptocurrency.quip.comIn scope2026-11-14
buylikesfollowers.quip.comIn scope2026-11-14
buzz.quip.comIn scope2026-11-14
www.buzz.quip.comIn scope2026-11-14
bv.quip.comIn scope2026-11-14
bw.quip.comIn scope2026-11-14
bwc.quip.comIn scope2026-11-14
by.quip.comIn scope2026-11-14
made.by.quip.comIn scope2026-11-14
www.by.quip.comIn scope2026-11-14
bydgoszcz.quip.comIn scope2026-11-14
byron.quip.comIn scope2026-11-14
bysj.quip.comIn scope2026-11-14
byte.quip.comIn scope2026-11-14
bz.quip.comIn scope2026-11-14
c.quip.comIn scope2026-11-14
www.c.quip.comIn scope2026-11-14
c0.quip.comIn scope2026-11-14
c1.quip.comIn scope2026-11-14
c10.quip.comIn scope2026-11-14
c11.quip.comIn scope2026-11-14
c12.quip.comIn scope2026-11-14
c13.quip.comIn scope2026-11-14
c2.quip.comIn scope2026-11-14
c21.quip.comIn scope2026-11-14
c2c.quip.comIn scope2026-11-14
c3.quip.comIn scope2026-11-14
c3po.quip.comIn scope2026-11-14
c4.quip.comIn scope2026-11-14
c4anvn3.quip.comIn scope2026-11-14
c5.quip.comIn scope2026-11-14
c6.quip.comIn scope2026-11-14
c64.quip.comIn scope2026-11-14
c7.quip.comIn scope2026-11-14
c8.quip.comIn scope2026-11-14
c9.quip.comIn scope2026-11-14
ca.quip.comIn scope2026-11-14
www.ca.quip.comIn scope2026-11-14
cab.quip.comIn scope2026-11-14
cabinet.quip.comIn scope2026-11-14
cable.quip.comIn scope2026-11-14
cabletelevisionbundles.quip.comIn scope2026-11-14
cabletvinternet.quip.comIn scope2026-11-14
cac.quip.comIn scope2026-11-14
caca.quip.comIn scope2026-11-14
cache.quip.comIn scope2026-11-14
cache1.quip.comIn scope2026-11-14
cache2.quip.comIn scope2026-11-14
cache3.quip.comIn scope2026-11-14
cacti.quip.comIn scope2026-11-14
cacti1.quip.comIn scope2026-11-14
cactus.quip.comIn scope2026-11-14
cad.quip.comIn scope2026-11-14
cadillac.quip.comIn scope2026-11-14
cae.quip.comIn scope2026-11-14
caesar.quip.comIn scope2026-11-14
cafe.quip.comIn scope2026-11-14
cag.quip.comIn scope2026-11-14
cai.quip.comIn scope2026-11-14
caiyun.quip.comIn scope2026-11-14
cake.quip.comIn scope2026-11-14
cakes.quip.comIn scope2026-11-14
cal.quip.comIn scope2026-11-14
calc.quip.comIn scope2026-11-14
calcium.quip.comIn scope2026-11-14
calculus.quip.comIn scope2026-11-14

20,412 names are covered by the program's own scope; 7 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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Updated