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Stepper

Stepper chains multi-step HTTP request sequences with automatic variable extraction, session management, and conditional logic. Define a login or token-refresh flow once, extract values from responses with regular expressions, and have the sequence replay transparently whenever Repeater, Intruder, or Scanner needs a fresh session. It can replace the combination of session handling rules and macros for many workflows.

Features

  • Build ordered sequences of requests, extract values from each response, and reuse them in later steps with the $VAR:name$ syntax.
  • Reference a published variable from Repeater, Intruder, or Scanner with $VAR:Sequence:name$ and have its sequence run automatically, keeping sessions valid during scans without manual intervention.
  • Keep published variables current as tokens refresh through normal browsing, so the latest value is reused without re-running the sequence.
  • Drive each step with conditions based on the status line or response body, including match and not-match modes, retry, and actions to continue, skip remaining steps, or jump to a named step.
  • Validate sessions before running a full login flow, and confirm session recovery afterwards, with an alert and pause when recovery repeatedly fails.
  • Define static global variables ($GVAR:name$) for credentials and constants, and dynamic global variables ($DVAR:name$) that update automatically from responses across all tools.
  • Run sequences reliably during concurrent scans, with the option to make other requests wait for an in-progress sequence so they receive freshly updated values.
  • Protect against data loss with scheduled backups of all sequences, variables, and settings, restorable through import and export.
  • Generate regex from highlighted response text, preview all variable replacements before sending, and review every step at a glance in the sequence overview.

Usage

  1. Create a sequence from the tree toolbar, then add steps directly or by sending a request from another tool to the Stepper sequence.
  2. For each step, define a post-execution variable with a regex (for example "token":"(.*?)" with the identifier jwt), or highlight text in a response and use Auto Regex.
  3. Reference extracted values in later steps with $VAR:jwt$; they are substituted at execution time.
  4. Run the whole sequence, or run only through a chosen step for a partial execution.
  5. To replace session handling, publish a variable and reference it as $VAR:Sequence:jwt$ from Repeater, Intruder, or Scanner; optionally mark a step as the pre-validation step so a valid session skips the rest of the flow.
  6. When a session handling rule injects a reference and its scope includes Extensions, add the "Variable Replacement for Extensions" session handling action after the injecting action so the reference resolves correctly.

Author

Author

Xre0uS, CoreyD97

Version

Version

2.3.4

Rating

Rating

Popularity

Popularity

Last updated

Last updated

30 June 2026

Estimated system impact

Estimated system impact

Overall impact: Medium

Memory
Low
CPU
Medium
General
Low
Scanner
Low

You can install BApps directly within Burp, via the BApp Store feature in the Burp Extender tool. You can also download them from here, for offline installation into Burp.

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Please note that extensions are written by third party users of Burp, and PortSwigger Web Security makes no warranty about their quality or usefulness for any particular purpose.

Go back to BappStore

Note:

Please note that extensions are written by third party users of Burp, and PortSwigger Web Security makes no warranty about their quality or usefulness for any particular purpose.