Business Logic Errors · passage 6 of 11
Text · Business Logic Errors/README.md
For testing systems you own or are authorised to test, and for defending them. Nothing here is run by this page.
Open this passage on GitHub* Attempt to pay in one currency, for example, USD, and request a refund in another, like EUR. The difference in conversion rates could result in a profit.
Source: Business Logic Errors/README.md in PayloadsAllTheThings. From PayloadsAllTheThings by Swissky and contributors. MIT License, Copyright (c) 2019 Swissky.
Every one of the 11 is a mark on the map. Named now: 1 to 11, reading order first.
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 2026-11-15 · CISA KEV checked 2026-11-15. Source: PayloadsAllTheThings by Swissky and contributors, MIT License. For authorised testing only.