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01/08/2026 8:59 pm
TL;DR: Custom scan checks let teams encode senior pentest logic into repeatable DAST coverage, helping them respond faster to zero-days, preserve institutional knowledge, and catch environment-specific weaknesses at scale, according to PortSwigger. The governance lesson is that security coverage fails when expertise stays trapped in individuals instead of becoming a durable control.
NHIMG editorial — based on content published by PortSwigger: 3 ways custom scan checks turn practitioner knowledge into scalable automation
By the numbers:
- 80% of identity breaches involved compromised non-human identities such as service accounts and API keys.
- 96% of organisations store secrets outside of secrets managers in vulnerable locations including code, config files, and CI/CD tools.
- Only 5.7% of organisations have full visibility into their service accounts.
Questions worth separating out
Q: How should security teams turn senior tester knowledge into repeatable coverage?
A: They should identify the checks that recur in manual testing, document the detection logic, and promote it into shared custom scan checks.
Q: Why do exposed secrets in applications matter to NHI governance?
A: Because the secret is often the identity.
Q: What breaks when security testing stays dependent on one expert?
A: Coverage becomes inconsistent, slow to update, and hard to defend.
Practitioner guidance
- Convert repeat findings into governed checks Identify the one or two checks your senior testers repeat most often, then turn them into named custom scan checks that run in every relevant scan profile.
- Add secret exposure patterns to DAST coverage Expand scan logic to look for API keys in JavaScript bundles, credentials in HTTP responses, and source map files that reveal implementation detail.
- Map application findings to NHI ownership When a scan identifies a leaked token or credential, route it to the system owner and the identity owner together so remediation includes revocation, rotation, and code cleanup rather than only application patching.
What's in the full article
PortSwigger's full article covers the operational detail this post intentionally leaves for the source:
- Step-by-step examples of how custom scan checks are structured inside Burp Suite DAST.
- Practical workflow guidance for moving a manually proven check into reusable automation.
- Examples of environmental conditions, such as tenant headers and source maps, that can be encoded into checks.
- Operational tips for using Burp Collaborator in active checks and handling out-of-band findings.
👉 Read PortSwigger's analysis of how custom scan checks scale practitioner knowledge →
Custom scan checks for AppSec: what teams can automate next?
Explore further
01/08/2026 9:06 pm
Custom scan checks are really a governance mechanism, not just a testing convenience. The article shows that when specialist knowledge stays trapped in one person’s head, the organisation loses repeatability and accountability. In practice, that means test coverage depends on staffing luck rather than control design, which is exactly the kind of drift that weakens application security programmes.
A question worth separating out:
Q: How do teams decide which custom checks are worth automating first?
A: Start with the checks that are high-frequency, high-impact, or tied to known exposure paths such as zero-days, secret leakage, and tenant boundary failures. If a weakness would be painful to rediscover manually across many applications, it is a strong candidate for automation.
👉 Read our full editorial: Custom scan checks turn pentest expertise into scalable coverage
