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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:Old and legacy
First seen
Text fileClear filters55 names
Subdomains of Slack
NameScopeFirst seen
archive.quip.comlegacyIn scope2026-11-14
autoconfig.archive.quip.comlegacyIn scope2026-11-14
autodiscover.archive.quip.comlegacy, mailIn scope2026-11-14
webdisk.archive.quip.comlegacyIn scope2026-11-14
www.archive.quip.comlegacyIn scope2026-11-14
bak.quip.comlegacyIn scope2026-11-14
classic.quip.comlegacyIn scope2026-11-14
legacy.quip.comlegacyIn scope2026-11-14
qa.legacy.quip.comlegacy, testIn scope2026-11-14
www.legacy.quip.comlegacyIn scope2026-11-14
mail-old.quip.comlegacy, mailIn scope2026-11-14
old.quip.comlegacyIn scope2026-11-14
old-www.quip.comlegacyIn scope2026-11-14
autoconfig.old.quip.comlegacyIn scope2026-11-14
autodiscover.old.quip.comlegacy, mailIn scope2026-11-14
webdisk.old.quip.comlegacyIn scope2026-11-14
www.old.quip.comlegacyIn scope2026-11-14
old1.quip.comlegacyIn scope2026-11-14
old2.quip.comlegacyIn scope2026-11-14
old3.quip.comlegacyIn scope2026-11-14
www-old.quip.comlegacyIn scope2026-11-14
3-komodo-platform-old.slack.comlegacyNot in the scope2026-11-14
old.api.slack.comapi, legacyNot in the scope2026-11-14
old.app.slack.comlegacyNot in the scope2026-11-14
autoconfig.archive.slack.comlegacyNot in the scope2026-11-14
autodiscover.archive.slack.comlegacy, mailNot in the scope2026-11-14
webdisk.archive.slack.comlegacyNot in the scope2026-11-14
www.archive.slack.comlegacyNot in the scope2026-11-14
bak.slack.comlegacyNot in the scope2026-11-14
classic.slack.comlegacyNot in the scope2026-11-14
deeson-agency-archive.slack.comlegacyNot in the scope2026-11-14
framer-deprecated.slack.comlegacyNot in the scope2026-11-14
infoeducatie-old.slack.comlegacyNot in the scope2026-11-14
komodo-platform-old.slack.comlegacyNot in the scope2026-11-14
kx-community-legacy.slack.comlegacyNot in the scope2026-11-14
legacy.slack.comlegacyNot in the scope2026-11-14
qa.legacy.slack.comlegacy, testNot in the scope2026-11-14
www.legacy.slack.comlegacyNot in the scope2026-11-14
mail-old.slack.comlegacy, mailNot in the scope2026-11-14
old.slack.comlegacyNot in the scope2026-11-14
old-gil.slack.comlegacyNot in the scope2026-11-14
old-timehl.slack.comlegacyNot in the scope2026-11-14
autoconfig.old.slack.comlegacyNot in the scope2026-11-14
autodiscover.old.slack.comlegacy, mailNot in the scope2026-11-14
webdisk.old.slack.comlegacyNot in the scope2026-11-14
www.old.slack.comlegacyNot in the scope2026-11-14
old1.slack.comlegacyNot in the scope2026-11-14
old2.slack.comlegacyNot in the scope2026-11-14
old3.slack.comlegacyNot in the 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