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Bug bounty program

XX

X / xAI

Open on HackerOneAtlas
Platform
HackerOne
Bounties
Pays
Assets in scope
23
Disclosed reports
248
Subdomains
10,596

Most upvoted reports248

All reports
Most upvoted reports of X / xAI
ReportWeaknessDisclosedBountyVotes
Potential pre-auth RCE on Twitter VPNAnalysed#591295Command and Code Injection2019-08-10$20,1601,246
Bypassing Digits origin validation which leads to account takeoverAnalysed#129873Authentication2020-06-24–619
CRLF injectionAnalysed#446271No weakness recorded2019-12-25–439
Read-only application can publish/delete fleetsAnalysed#1032468Access Control2021-01-04–398
Blind XSS on Twitter's internal Big Data panel at █████████████Analysed#1207040Cross-site Scripting2021-07-09–357
Private list members disclosure via GraphQLAnalysed#885539Access Control2020-08-04–346
[Urgent] Invalidating OAuth2 Bearer token makes TweetDeck unavailableAnalysed#210779Denial of Service2019-04-25–323
Bypass Password Authentication for updating email and phone number - Security VulnerabilityAnalysed#770504Authentication2020-02-08–288
Insufficient OAuth callback validation which leads to Periscope account takeoverAnalysed#110293Authentication2019-04-10–277
Insufficient validation on Digits bridgeAnalysed#168116Authentication2020-08-20–263

Subdomains10,596

Root
Scope
Name suggests:VPN and remote access
First seen
Text fileClear filters20 names
Subdomains of X / xAI
NameScopeFirst seen
access.twitter.comvpnIn scope2026-11-14
vpn-lab.atlc.twitter.comvpnIn scope2026-11-14
vpn-license.atlc.twitter.comvpnIn scope2026-11-14
vpn1.atlc.twitter.comvpnIn scope2026-11-14
vpn2.atlc.twitter.comvpnIn scope2026-11-14
vpn-license.corp.twitter.cominternal, vpnIn scope2026-11-14
horizon.twitter.comvpnIn scope2026-11-14
horizon-dev.twitter.comdev, vpnIn scope2026-11-14
horizon-staging.twitter.comstaging, vpnIn scope2026-11-14
horizon2020pic.twitter.comvpnIn scope2026-11-14
atlc-vpn1-au.net.twitter.comvpnIn scope2026-11-14
atlc-vpn2-au.net.twitter.comvpnIn scope2026-11-14
smfc-vpn1-au.net.twitter.comvpnIn scope2026-11-14
smfc-vpn2-au.net.twitter.comvpnIn scope2026-11-14
vpn-lab-au1.net.twitter.comvpnIn scope2026-11-14
vpn-lab.smfc.twitter.comvpnIn scope2026-11-14
vpn-license.smfc.twitter.comvpnIn scope2026-11-14
vpn1.smfc.twitter.comvpnIn scope2026-11-14
vpn2.smfc.twitter.comvpnIn scope2026-11-14
vpn.twitter.comvpnIn scope2026-11-14

10,296 names are covered by the program's own scope; 0 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