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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
eu.cdn.quip.comIn scope2026-11-14
n1.eu.cdn.quip.comIn scope2026-11-14
webdisk.cdn.quip.comIn scope2026-11-14
www.cdn.quip.comIn scope2026-11-14
cdn01.quip.comIn scope2026-11-14
cdn1.quip.comIn scope2026-11-14
cdn101.quip.comIn scope2026-11-14
cdn102.quip.comIn scope2026-11-14
cdn103.quip.comIn scope2026-11-14
cdn2.quip.comIn scope2026-11-14
www.cdn2.quip.comIn scope2026-11-14
cdn3.quip.comIn scope2026-11-14
cdn4.quip.comIn scope2026-11-14
cdn5.quip.comIn scope2026-11-14
cdo.quip.comIn scope2026-11-14
cdp.quip.comIn scope2026-11-14
cdr.quip.comIn scope2026-11-14
cdrom.quip.comIn scope2026-11-14
cds.quip.comIn scope2026-11-14
cdserver.quip.comIn scope2026-11-14
ce.quip.comIn scope2026-11-14
cea.quip.comIn scope2026-11-14
cec.quip.comIn scope2026-11-14
cecilia.quip.comIn scope2026-11-14
ced.quip.comIn scope2026-11-14
cedar.quip.comIn scope2026-11-14
cedric.quip.comIn scope2026-11-14
cel.quip.comIn scope2026-11-14
celcom.quip.comIn scope2026-11-14
celebrity.quip.comIn scope2026-11-14
celeste.quip.comIn scope2026-11-14
celine.quip.comIn scope2026-11-14
cell.quip.comIn scope2026-11-14
cellbi-locksmiths.quip.comIn scope2026-11-14
celular.quip.comIn scope2026-11-14
cem.quip.comIn scope2026-11-14
centaurus.quip.comIn scope2026-11-14
centennial.quip.comIn scope2026-11-14
center.quip.comIn scope2026-11-14
www.center.quip.comIn scope2026-11-14
centos.quip.comIn scope2026-11-14
central.quip.comIn scope2026-11-14
www.central.quip.comIn scope2026-11-14
centre.quip.comIn scope2026-11-14
centricconsultingsfdcso.quip.comIn scope2026-11-14
centrify.quip.comIn scope2026-11-14
centro.quip.comIn scope2026-11-14
centurion.quip.comIn scope2026-11-14
ceo.quip.comIn scope2026-11-14
cep.quip.comIn scope2026-11-14
www.cep.quip.comIn scope2026-11-14
ceramics.quip.comIn scope2026-11-14
cerbere.quip.comIn scope2026-11-14
cerberus.quip.comIn scope2026-11-14
cerealkillers.quip.comIn scope2026-11-14
ceres.quip.comIn scope2026-11-14
cert.quip.comIn scope2026-11-14
www.cert.quip.comIn scope2026-11-14
certificate.quip.comIn scope2026-11-14
certification.quip.comIn scope2026-11-14
ces.quip.comIn scope2026-11-14
www.ces.quip.comIn scope2026-11-14
cesar.quip.comIn scope2026-11-14
cet.quip.comIn scope2026-11-14
cetus.quip.comIn scope2026-11-14
cf.quip.comIn scope2026-11-14
www.cf.quip.comIn scope2026-11-14
cfd.quip.comIn scope2026-11-14
cfd185.quip.comIn scope2026-11-14
cfd264.quip.comIn scope2026-11-14
cfd297.quip.comIn scope2026-11-14
cfd307.quip.comIn scope2026-11-14
cfg.quip.comIn scope2026-11-14
cfs.quip.comIn scope2026-11-14
cg.quip.comIn scope2026-11-14
cgc.quip.comIn scope2026-11-14
cgi.quip.comIn scope2026-11-14
cgisf.quip.comIn scope2026-11-14
cgm.quip.comIn scope2026-11-14
cgp.quip.comIn scope2026-11-14
cgs.quip.comIn scope2026-11-14
ch.quip.comIn scope2026-11-14
www.ch.quip.comIn scope2026-11-14
cha.quip.comIn scope2026-11-14
chacha.quip.comIn scope2026-11-14
chaitanya.quip.comIn scope2026-11-14
chakorstudios.quip.comIn scope2026-11-14
chalet.quip.comIn scope2026-11-14
challenge.quip.comIn scope2026-11-14
challenger.quip.comIn scope2026-11-14
champion.quip.comIn scope2026-11-14
champions.quip.comIn scope2026-11-14
chan.quip.comIn scope2026-11-14
chance.quip.comIn scope2026-11-14
chandler.quip.comIn scope2026-11-14
chandra.quip.comIn scope2026-11-14
change.quip.comIn scope2026-11-14
changes.quip.comIn scope2026-11-14
channel.quip.comIn scope2026-11-14
channels.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