Vexta's Proof-of-Concept Generator for Bug Bounty Reports

A proof of concept generator for bug bounty work is a tool feature that automatically packages the evidence, request, and reproduction steps for a confirmed vulnerability so a hunter does not have to rebuild them by hand before submitting a report. Vexta does this for every finding it verifies, producing a reproduction package rather than a one-line description. For a hunter juggling a dozen open findings across two programs, that packaging step is often the difference between submitting a report the same day and letting it sit for a week.

The problem: verified isn't the same as submittable

Finding a vulnerability and writing it up for a triager are two different jobs. A hunter can confirm a SQL injection in Burp, screenshot the response, and still spend forty minutes afterward reconstructing a clean curl command, formatting the raw request, and writing steps a stranger on the other end can follow without access to the original session.

That gap is where reports go stale. A finding that sat verified in a notes file for three days because the write-up got deprioritized is a finding a triager sees late, or a finding that gets duplicated by another hunter who submitted first. The work of confirming the bug and the work of documenting it compete for the same hour, and documentation usually loses.

What Vexta packages for every finding

Vexta's PoC generator attaches a bug-bounty-ready reproduction package to every finding automatically, at the moment the finding is verified, not as a separate report-writing pass.

The package has six parts: a copy-paste curl command for terminal reproduction, a self-contained HTML page for browser-based exploits, a raw HTTP request formatted to paste directly into Burp Repeater, a numbered step-by-step guide, the request/response evidence with the payload highlighted, and a machine-parseable CVSS 3.1 vector string.

Each piece serves a different reader. The triager scanning fifty reports a day wants the curl command and the highlighted evidence. The engineer who has to fix it wants the step-by-step guide. The platform's intake form wants the CVSS vector in a format it can parse without a human retyping it.

How does the HTML PoC work for browser-based findings?

For vulnerability classes that only make sense in a browser, such as stored cross-site scripting or a clickjacking setup, a curl command does not demonstrate the impact. Vexta's HTML PoC is a self-contained `.html` file that reproduces the interaction when opened, so a triager can see the exploit fire rather than read a description of what would happen if they clicked a link.

This matters for authorized testing specifically because the PoC is a confirmation artifact for a finding inside an approved scope, not an attack tool aimed at anything outside it. The point is to let the person deciding whether to pay a bounty verify the claim in under a minute.

Exporting straight to HackerOne and Bugcrowd

Once a finding has its PoC package, Vexta offers one-click export to HackerOne, Bugcrowd, and plain Markdown formats. That closes the loop from verified finding to submitted report without a hunter retyping the request, re-pasting the evidence, or reformatting the CVSS string into whichever field the platform expects.

The export targets are named here because they are the two most common destinations pentesters actually use, not as an endorsement over any other platform. Programs that use different intake tooling still get full value from the underlying reproduction package, which is plain curl, raw HTTP, and Markdown, none of it locked to a specific platform's format.

Where this fits in a scan, and why the format matters

The PoC generator runs downstream of Vexta's proof-of-exploitation engine, which is what actually confirms a finding is real before anything gets packaged for submission. A finding that comes back unproven, meaning the verifier could not safely confirm it within scope, does not get treated the same as one marked proven; the reproduction package reflects that distinction so a hunter knows which findings are submission-ready and which need a manual look first.

That sequencing also protects the hunter's credibility. A report built around a curl command and a highlighted response, both generated straight from a confirmed exchange, reads differently to a triager than a screenshot and a written claim. It shows the exact request that was sent, the exact response that came back, and a CVSS vector that maps to real severity, not an estimate.

The consistency also pays off across programs. Instead of relearning a submission format for every platform, the underlying package (curl, raw HTTP, Markdown) works whether the destination is a HackerOne form, a Bugcrowd submission, or an email to a program that runs its own intake. Plan availability for the full proof-of-exploitation engine and PoC export varies; see plans on the pricing page for specifics.

Key takeaways

The short version of what the PoC generator changes for a hunter's workflow: