FintechAPI
Cross-tenant invoice exposure
One missing object-level authorisation check let any authenticated tenant read another tenant's invoices.
3Critical
7High
9dTo fix
Fixed-scope penetration testing
Know what an attacker can do to your product.
Tell us what you are building. We come back with a scoped plan, a fixed price and a testing window — usually within one business day. Web, API, cloud and LLM security testing by senior testers.
- Every finding reproduced end to end before it is reported
- Executive brief plus technical report with CVSS v4 scoring
- Remediation guidance and a free retest window
Start your assessment
OWASP Top 10
OWASP API Top 10
OWASP LLM Top 10
PTES
NIST SP 800-115
CVSS v4.0
ISO 27001 alignment
OWASP Top 10
OWASP API Top 10
OWASP LLM Top 10
PTES
NIST SP 800-115
CVSS v4.0
ISO 27001 alignment
Three steps
From first message to fixed.
1. Scoping call
Thirty minutes to confirm targets, constraints and timing. You get a written proposal with a fixed price, and an NDA first if you want one.
2. Testing window
Senior testers work the agreed scope under signed rules of engagement. Critical findings are escalated the day they are confirmed.
3. Report and retest
Executive brief, technical report with reproduction steps, an engineer walkthrough, and a retest window once fixes ship.
What lands on your desk
A report your engineers can act on.
No scanner dumps and no severity inflation. Each finding carries impact, prerequisites, reproduction steps and a fix at code level.
Finding record — sample
Critical
CVSS 9.3
CWE-639
API1 BOLA
ImpactRead access to any tenant's invoice records
PrerequisiteOne valid low-privilege tenant account
EvidenceRequest and response captures, retained for retest
FixServer-side ownership check before the query executes
Who we are
Security testers and software engineers, under one roof.
RASTTSec exists because the gap between a penetration test report and a working fix is where most security programmes quietly fail. Our testers hand findings to engineers who sit in the same stand-ups, so remediation is realistic, prioritised and — if you want it — delivered rather than described.
- Senior-only delivery: the consultant who scopes the engagement is the one testing it.
- Evidence over opinion: if we cannot reproduce it, we do not report it as confirmed.
- Discretion as standard: NDA before scoping, minimum necessary access, agreed deletion timelines.
Senior work only
No pyramid staffing and no juniors learning on your production systems. The person on the call is the person testing.
Fix-side accountability
We stay through the fix window. A perfect report that never becomes a code change is a failed engagement.
Remote-first, worldwide
Delivered remotely by default, with on-site visits for internal network and physical-adjacent scopes.
Standards you can cite
Methodology aligned to OWASP, PTES, NIST SP 800-115 and CVSS v4.0 — references your auditor recognises.
Our services
Nine service lines, one team.
Start with the surface that worries you most. Most clients begin with one assessment and grow into a retainer.
Penetration TestingExternal, internal and assumed-breach
Web App PentestOWASP Top 10 and business logic
API PentestREST, GraphQL, authz and tokens
LLM & AI PentestPrompt injection, jailbreaks, exfiltration
Cloud & InfrastructureIAM, exposure, containers, CI/CD
Compliance ReadinessISO 27001, SOC 2, PCI DSS evidence
Secure Code ReviewManual review plus SAST triage
Web App DevelopmentSecure-by-design product builds
Software DevelopmentPlatforms, APIs and automation
Our work
What testing actually turns up.
Sanitised results from engagements across fintech, healthcare, SaaS and e-commerce.
SaaSLLM
Support assistant data leakage
Indirect injection through retrieved documents exposed the system prompt and unrelated customer records.
1Critical
6High
0/5Runs after fix
HealthcareCloud
Public backup bucket
Infrastructure drift left a nightly backup bucket world-readable while the application itself was well hardened.
2Critical
4High
3dTo fix
Ready when you are.
Send the scope or just describe the worry. We will tell you the smallest engagement that answers it.