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Bug bounty program

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

Subdomains of Slack
NameScopeFirst seen
adm.quip.comadminIn scope2026-11-14
www.adm.quip.comadminIn scope2026-11-14
adm2.quip.comadminIn scope2026-11-14
admin.quip.comadminIn scope2026-11-14
admin-staging.quip.comadmin, stagingIn scope2026-11-14
autoconfig.admin.quip.comadminIn scope2026-11-14
autodiscover.admin.quip.comadmin, mailIn scope2026-11-14
beta.admin.quip.comadmin, stagingIn scope2026-11-14
builder.admin.quip.comadminIn scope2026-11-14
dev.admin.quip.comadmin, devIn scope2026-11-14
webdisk.admin.quip.comadminIn scope2026-11-14
webmail.admin.quip.comadmin, mailIn scope2026-11-14
www.admin.quip.comadminIn scope2026-11-14
admin01.quip.comadminIn scope2026-11-14
admin1.quip.comadminIn scope2026-11-14
admin2.quip.comadminIn scope2026-11-14
admin3.quip.comadminIn scope2026-11-14
admin5.quip.comadminIn scope2026-11-14
admin6.quip.comadminIn scope2026-11-14
administration.quip.comadminIn scope2026-11-14
administrator.quip.comadminIn scope2026-11-14
backoffice.quip.comadminIn scope2026-11-14
cms.quip.comadminIn scope2026-11-14
www.cms.quip.comadminIn scope2026-11-14
cms1.quip.comadminIn scope2026-11-14
cms2.quip.comadminIn scope2026-11-14
cms3.quip.comadminIn scope2026-11-14
console.quip.comadminIn scope2026-11-14
cpanel.quip.comadminIn scope2026-11-14
builder.cpanel.quip.comadminIn scope2026-11-14
webmail.cpanel.quip.comadmin, mailIn scope2026-11-14
www.cpanel.quip.comadminIn scope2026-11-14
cpanel1.quip.comadminIn scope2026-11-14
cpanel2.quip.comadminIn scope2026-11-14
cpanel3.quip.comadminIn scope2026-11-14
dashboard.quip.comadminIn scope2026-11-14
dev-admin.quip.comadmin, devIn scope2026-11-14
admin.dev.quip.comadmin, devIn scope2026-11-14
admin.m.quip.comadminIn scope2026-11-14
manage.quip.comadminIn scope2026-11-14
www.manage.quip.comadminIn scope2026-11-14
management.quip.comadminIn scope2026-11-14
www.management.quip.comadminIn scope2026-11-14
manager.quip.comadminIn scope2026-11-14
www.manager.quip.comadminIn scope2026-11-14
panel.quip.comadminIn scope2026-11-14
www.panel.quip.comadminIn scope2026-11-14
panel2.quip.comadminIn scope2026-11-14
phpmyadmin.quip.comadminIn scope2026-11-14
www.phpmyadmin.quip.comadminIn scope2026-11-14
phpmyadmin2.quip.comadminIn scope2026-11-14
admin.test.quip.comadmin, testIn 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.