Basecamp · disclosed reports
Authentication
9 disclosed reports · $8,687 paid · 9 valid
Every dot is a report; the named ones are the most upvoted. Bright dots were paid a bounty. A report opens its page here: our analysis where there is one, and the link to HackerOne. The status is HackerOne's own outcome; "access needed" is only what a title states.
Open Basecamp on HackerOne- reports
- 9
- valid
- 9
- paid a bounty
- 4
Every one of the 9 is a mark on the map. Named now: 1 to 9, most upvoted first.
- Improper bot-authentication allows to impersonate any user when sending messages in a room
- User can upload files even after closing his account
- Able to steal bearer token from deep link
- launchpad.37signals.com OAuth AS issues victim-bound credential to unverified attacker redirect → full CIA triad on Basecamp API
- Password reset link not expiring after changing password in settings
- Cross-account webhook takeover: PUT and DELETE on /<account>/webhooks/<id>.json reach another account's webhook
- Improper Authentication via previous backup code login
- Login session not expire
- SSL expired subdomain leads to API swap with main and flagged cookies. Unable to log device ids and certain session tokens.
paid a bounty
Zoom in on the map and the dots under the middle of it are named where they are.
Data as of 2026-11-15. CVE List through 2026-11-15 · EPSS of 2026-11-14 · CISA KEV checked 2026-11-15. Sources: the CVE List, CISA KEV, EPSS, NVD, nuclei templates and public bug bounty data.